[docs] Mark percolator response snippets properly
[docs] Mark percolator response snippets properly

Now the docs tests will catch any errors in the responses. This
would have caught the error fixed in
https://github.com/elastic/elasticsearch/pull/20351

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