v2.8.2
[DOCFIX] Update the posix api doc cache tuning
[DOCFIX] Fix AWS-emr doc grammar
[DOCFIX] Clean up Eng Doc - remove HBase
[DOCFIX] Clean up Eng Doc - remove glusterfs
[DOCFIX] Add docs for paging store
[DOCFIX] Add mention of ARM architecture in requirements doc
Remove Ufs Extension
Modify metrics name to avoid docGen failure
[DOCFIX] Merge doc restructure (#8067)