* grafana/master: (44 commits)
  feature(explore/table): Add tooltips to explore table (#16007)
  Update changelog
  Add check for Env before log
  Update index.md
  chore: Cleaning up implicit anys in manage_dashboard.ts and manage_dashboard.test.ts progress: #14714
  chore: Cleaning up implicit anys in app.ts progress: #14714
  changelog: adds note about closing #15836
  changelog: adds note about closing #6359 and #15931
  add partial
  Add check so that header is not sent for anonymous users
  Update config docs
  Add custom header with grafana user and a config switch for it
  changelog: adds note about closing #10816
  use constants for cache type
  updates old distcache names
  dont allow inifinite expiration
  return error if cache type is invalid
  use `Get` instead of `Find`
  avoid exposing cache client directly
  add docs about remote cache settings
  ...