docs: adjust grok processor docs to not mention pattern files as these no longer exist
docs: adjust grok processor docs to not mention pattern files as these no longer exist

Closes #17692

bawse/elasticsearch,myelin/elasticsearch,cwurm/elasticsearch,Helen-Zhao/elasticsearch,dpursehouse/elasticsearch,gmarz/elasticsearch,cwurm/elasticsearch,kalimatas/elasticsearch,cwurm/elasticsearch,LeoYao/elasticsearch,glefloch/elasticsearch,coding0011/elasticsearch,JervyShi/elasticsearch,mohit/elasticsearch,i-am-Nathan/elasticsearch,s1monw/elasticsearch,elasticdog/elasticsearch,jimczi/elasticsearch,wuranbo/elasticsearch,gingerwizard/elasticsearch,uschindler/elasticsearch,zkidkid/elasticsearch,qwerty4030/elasticsearch,cwurm/elasticsearch,shreejay/elasticsearch,vroyer/elassandra,jprante/elasticsearch,fred84/elasticsearch,LewayneNaidoo/elasticsearch,lks21c/elasticsearch,fred84/elasticsearch,ricardocerq/elasticsearch,maddin2016/elasticsearch,artnowo/elasticsearch,henakamaMSFT/elasticsearch,mikemccand/elasticsearch,nilabhsagar/elasticsearch,mikemccand/elasticsearch,naveenhooda2000/elasticsearch,rajanm/elasticsearch,naveenhooda2000/elasticsearch,vroyer/elassandra,mortonsykes/elasticsearch,markwalkom/elasticsearch,strapdata/elassandra5-rc,wenpos/elasticsearch,ThiagoGarciaAlves/elasticsearch,ThiagoGarciaAlves/elasticsearch,gfyoung/elasticsearch,wangtuo/elasticsearch,alexshadow007/elasticsearch,fforbeck/elasticsearch,awislowski/elasticsearch,mortonsykes/elasticsearch,sneivandt/elasticsearch,wangtuo/elasticsearch,alexshadow007/elasticsearch,rlugojr/elasticsearch,robin13/elasticsearch,IanvsPoplicola/elasticsearch,mikemccand/elasticsearch,i-am-Nathan/elasticsearch,brandonkearby/elasticsearch,Shepard1212/elasticsearch,yynil/elasticsearch,trangvh/elasticsearch,uschindler/elasticsearch,mortonsykes/elasticsearch,StefanGor/elasticsearch,gingerwizard/elasticsearch,ThiagoGarciaAlves/elasticsearch,yynil/elasticsearch,scottsom/elasticsearch,strapdata/elassandra,nazarewk/elasticsearch,geidies/elasticsearch,sneivandt/elasticsearch,vroyer/elasticassandra,pozhidaevak/elasticsearch,nomoa/elasticsearch,mohit/elasticsearch,JSCooke/elasticsearch,Shepard1212/elasticsearch,avikurapati/elasticsearch,artnowo/elasticsearch,nknize/elasticsearch,umeshdangat/elasticsearch,nilabhsagar/elasticsearch,winstonewert/elasticsearch,IanvsPoplicola/elasticsearch,zkidkid/elasticsearch,mohit/elasticsearch,mohit/elasticsearch,vroyer/elasticassandra,MaineC/elasticsearch,yanjunh/elasticsearch,henakamaMSFT/elasticsearch,gfyoung/elasticsearch,sreeramjayan/elasticsearch,zkidkid/elasticsearch,strapdata/elassandra5-rc,Shepard1212/elasticsearch,HonzaKral/elasticsearch,dongjoon-hyun/elasticsearch,myelin/elasticsearch,vroyer/elassandra,jprante/elasticsearch,girirajsharma/elasticsearch,glefloch/elasticsearch,nilabhsagar/elasticsearch,sreeramjayan/elasticsearch,ZTE-PaaS/elasticsearch,fernandozhu/elasticsearch,JervyShi/elasticsearch,njlawton/elasticsearch,pozhidaevak/elasticsearch,rlugojr/elasticsearch,s1monw/elasticsearch,qwerty4030/elasticsearch,yanjunh/elasticsearch,wangtuo/elasticsearch,scottsom/elasticsearch,GlenRSmith/elasticsearch,Shepard1212/elasticsearch,markwalkom/elasticsearch,rajanm/elasticsearch,qwerty4030/elasticsearch,JackyMai/elasticsearch,gingerwizard/elasticsearch,awislowski/elasticsearch,rajanm/elasticsearch,JSCooke/elasticsearch,wangtuo/elasticsearch,markwalkom/elasticsearch,kalimatas/elasticsearch,MisterAndersen/elasticsearch,JSCooke/elasticsearch,LewayneNaidoo/elasticsearch,LeoYao/elasticsearch,IanvsPoplicola/elasticsearch,s1monw/elasticsearch,ricardocerq/elasticsearch,mmaracic/elasticsearch,nezirus/elasticsearch,ricardocerq/elasticsearch,alexshadow007/elasticsearch,robin13/elasticsearch,yynil/elasticsearch,obourgain/elasticsearch,avikurapati/elasticsearch,nknize/elasticsearch,ricardocerq/elasticsearch,rajanm/elasticsearch,sreeramjayan/elasticsearch,LeoYao/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,strapdata/elassandra5-rc,fforbeck/elasticsearch,scorpionvicky/elasticsearch,jimczi/elasticsearch,LeoYao/elasticsearch,fernandozhu/elasticsearch,camilojd/elasticsearch,mjason3/elasticsearch,HonzaKral/elasticsearch,artnowo/elasticsearch,trangvh/elasticsearch,robin13/elasticsearch,fred84/elasticsearch,mortonsykes/elasticsearch,artnowo/elasticsearch,ZTE-PaaS/elasticsearch,liweinan0423/elasticsearch,wenpos/elasticsearch,qwerty4030/elasticsearch,masaruh/elasticsearch,scottsom/elasticsearch,i-am-Nathan/elasticsearch,yanjunh/elasticsearch,nomoa/elasticsearch,markwalkom/elasticsearch,sreeramjayan/elasticsearch,mjason3/elasticsearch,dongjoon-hyun/elasticsearch,scorpionvicky/elasticsearch,pozhidaevak/elasticsearch,scorpionvicky/elasticsearch,brandonkearby/elasticsearch,masaruh/elasticsearch,liweinan0423/elasticsearch,dpursehouse/elasticsearch,naveenhooda2000/elasticsearch,artnowo/elasticsearch,nezirus/elasticsearch,JervyShi/elasticsearch,masaruh/elasticsearch,dongjoon-hyun/elasticsearch,spiegela/elasticsearch,LewayneNaidoo/elasticsearch,camilojd/elasticsearch,jimczi/elasticsearch,nazarewk/elasticsearch,C-Bish/elasticsearch,IanvsPoplicola/elasticsearch,lks21c/elasticsearch,strapdata/elassandra,trangvh/elasticsearch,spiegela/elasticsearch,bawse/elasticsearch,nilabhsagar/elasticsearch,elasticdog/elasticsearch,yanjunh/elasticsearch,fernandozhu/elasticsearch,shreejay/elasticsearch,wuranbo/elasticsearch,Helen-Zhao/elasticsearch,HonzaKral/elasticsearch,ZTE-PaaS/elasticsearch,MisterAndersen/elasticsearch,geidies/elasticsearch,alexshadow007/elasticsearch,palecur/elasticsearch,s1monw/elasticsearch,shreejay/elasticsearch,Stacey-Gammon/elasticsearch,strapdata/elassandra5-rc,sreeramjayan/elasticsearch,spiegela/elasticsearch,avikurapati/elasticsearch,Stacey-Gammon/elasticsearch,dpursehouse/elasticsearch,alexshadow007/elasticsearch,obourgain/elasticsearch,kalimatas/elasticsearch,mmaracic/elasticsearch,nknize/elasticsearch,coding0011/elasticsearch,myelin/elasticsearch,StefanGor/elasticsearch,yynil/elasticsearch,henakamaMSFT/elasticsearch,jprante/elasticsearch,elasticdog/elasticsearch,Stacey-Gammon/elasticsearch,awislowski/elasticsearch,wenpos/elasticsearch,fernandozhu/elasticsearch,palecur/elasticsearch,naveenhooda2000/elasticsearch,kalimatas/elasticsearch,liweinan0423/elasticsearch,palecur/elasticsearch,mmaracic/elasticsearch,bawse/elasticsearch,naveenhooda2000/elasticsearch,umeshdangat/elasticsearch,Stacey-Gammon/elasticsearch,zkidkid/elasticsearch,fforbeck/elasticsearch,cwurm/elasticsearch,IanvsPoplicola/elasticsearch,nezirus/elasticsearch,strapdata/elassandra,LeoYao/elasticsearch,henakamaMSFT/elasticsearch,winstonewert/elasticsearch,elasticdog/elasticsearch,nilabhsagar/elasticsearch,LeoYao/elasticsearch,glefloch/elasticsearch,uschindler/elasticsearch,mmaracic/elasticsearch,fred84/elasticsearch,C-Bish/elasticsearch,girirajsharma/elasticsearch,qwerty4030/elasticsearch,rlugojr/elasticsearch,jprante/elasticsearch,maddin2016/elasticsearch,MisterAndersen/elasticsearch,Shepard1212/elasticsearch,awislowski/elasticsearch,MaineC/elasticsearch,yynil/elasticsearch,glefloch/elasticsearch,scottsom/elasticsearch,GlenRSmith/elasticsearch,njlawton/elasticsearch,geidies/elasticsearch,spiegela/elasticsearch,wuranbo/elasticsearch,mjason3/elasticsearch,mjason3/elasticsearch,sneivandt/elasticsearch,elasticdog/elasticsearch,scorpionvicky/elasticsearch,Helen-Zhao/elasticsearch,JervyShi/elasticsearch,girirajsharma/elasticsearch,mohit/elasticsearch,mortonsykes/elasticsearch,a2lin/elasticsearch,dongjoon-hyun/elasticsearch,nknize/elasticsearch,pozhidaevak/elasticsearch,gfyoung/elasticsearch,maddin2016/elasticsearch,a2lin/elasticsearch,coding0011/elasticsearch,shreejay/elasticsearch,njlawton/elasticsearch,GlenRSmith/elasticsearch,ZTE-PaaS/elasticsearch,scorpionvicky/elasticsearch,brandonkearby/elasticsearch,mikemccand/elasticsearch,pozhidaevak/elasticsearch,glefloch/elasticsearch,camilojd/elasticsearch,maddin2016/elasticsearch,nknize/elasticsearch,StefanGor/elasticsearch,nezirus/elasticsearch,vroyer/elasticassandra,avikurapati/elasticsearch,liweinan0423/elasticsearch,sneivandt/elasticsearch,MaineC/elasticsearch,ThiagoGarciaAlves/elasticsearch,a2lin/elasticsearch,brandonkearby/elasticsearch,gingerwizard/elasticsearch,lks21c/elasticsearch,gmarz/elasticsearch,jprante/elasticsearch,JackyMai/elasticsearch,Helen-Zhao/elasticsearch,coding0011/elasticsearch,mmaracic/elasticsearch,uschindler/elasticsearch,avikurapati/elasticsearch,JervyShi/elasticsearch,maddin2016/elasticsearch,girirajsharma/elasticsearch,wenpos/elasticsearch,liweinan0423/elasticsearch,bawse/elasticsearch,obourgain/elasticsearch,strapdata/elassandra,mikemccand/elasticsearch,JackyMai/elasticsearch,fernandozhu/elasticsearch,umeshdangat/elasticsearch,JackyMai/elasticsearch,MaineC/elasticsearch,jimczi/elasticsearch,winstonewert/elasticsearch,myelin/elasticsearch,sreeramjayan/elasticsearch,StefanGor/elasticsearch,wenpos/elasticsearch,wuranbo/elasticsearch,robin13/elasticsearch,C-Bish/elasticsearch,ThiagoGarciaAlves/elasticsearch,nomoa/elasticsearch,umeshdangat/elasticsearch,rajanm/elasticsearch,gingerwizard/elasticsearch,LewayneNaidoo/elasticsearch,henakamaMSFT/elasticsearch,mjason3/elasticsearch,strapdata/elassandra5-rc,ThiagoGarciaAlves/elasticsearch,camilojd/elasticsearch,a2lin/elasticsearch,i-am-Nathan/elasticsearch,yynil/elasticsearch,LeoYao/elasticsearch,spiegela/elasticsearch,nezirus/elasticsearch,Stacey-Gammon/elasticsearch,rajanm/elasticsearch,kalimatas/elasticsearch,wangtuo/elasticsearch,winstonewert/elasticsearch,gingerwizard/elasticsearch,JSCooke/elasticsearch,gingerwizard/elasticsearch,markwalkom/elasticsearch,coding0011/elasticsearch,umeshdangat/elasticsearch,MaineC/elasticsearch,dpursehouse/elasticsearch,nazarewk/elasticsearch,lks21c/elasticsearch,winstonewert/elasticsearch,StefanGor/elasticsearch,shreejay/elasticsearch,strapdata/elassandra,nazarewk/elasticsearch,gfyoung/elasticsearch,C-Bish/elasticsearch,MisterAndersen/elasticsearch,rlugojr/elasticsearch,palecur/elasticsearch,girirajsharma/elasticsearch,uschindler/elasticsearch,dpursehouse/elasticsearch,sneivandt/elasticsearch,nomoa/elasticsearch,JackyMai/elasticsearch,yanjunh/elasticsearch,gfyoung/elasticsearch,i-am-Nathan/elasticsearch,jimczi/elasticsearch,geidies/elasticsearch,wuranbo/elasticsearch,myelin/elasticsearch,fred84/elasticsearch,mmaracic/elasticsearch,JSCooke/elasticsearch,njlawton/elasticsearch,brandonkearby/elasticsearch,palecur/elasticsearch,zkidkid/elasticsearch,obourgain/elasticsearch,trangvh/elasticsearch,fforbeck/elasticsearch,ZTE-PaaS/elasticsearch,fforbeck/elasticsearch,camilojd/elasticsearch,a2lin/elasticsearch,MisterAndersen/elasticsearch,geidies/elasticsearch,njlawton/elasticsearch,nomoa/elasticsearch,masaruh/elasticsearch,camilojd/elasticsearch,JervyShi/elasticsearch,s1monw/elasticsearch,lks21c/elasticsearch,scottsom/elasticsearch,dongjoon-hyun/elasticsearch,gmarz/elasticsearch,awislowski/elasticsearch,markwalkom/elasticsearch,geidies/elasticsearch,gmarz/elasticsearch,Helen-Zhao/elasticsearch,girirajsharma/elasticsearch,nazarewk/elasticsearch,C-Bish/elasticsearch,masaruh/elasticsearch,HonzaKral/elasticsearch,ricardocerq/elasticsearch,gmarz/elasticsearch,rlugojr/elasticsearch,obourgain/elasticsearch,GlenRSmith/elasticsearch,bawse/elasticsearch,trangvh/elasticsearch,LewayneNaidoo/elasticsearch