Add docs for the batch mode of plugin installation (#21700)
Add docs for the batch mode of plugin installation (#21700)

* Add docs for the batch mode of plugin installation

Closes https://github.com/elastic/elasticsearch/issues/21490

* Updated to clarify that all permissions are granted automatically in batch mode

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