[7.x] [Index Management] Added data-test-subj values to the index context menu buttons (#114900)#114959

tylersmalley merged 9 commits intoelastic:7.16elastic/kibana:7.16from

kibanamachine:backport/7.x/pr-114900kibanamachine/kibana:backport/7.x/pr-114900Copy head branch name to clipboard