Fix a 500 error in the SSH host keys lookup action

Closes #3312

See merge request !2827

CE upstream: Friday

Closes gitaly#184, gitaly#219, #3298, gitaly#486, gitlab-ce#37194, and gitlab-ce#34864

See merge request !2806

Port "Protected runner executes jobs on protected branch [Solution 1]" to EE

See merge request !2820

Make mirror user dropdown in project settings consistent

See merge request !2706

Make target branch dropdown on merge request edit page consistent

See merge request !2805

Make protected branches / tags permission dropdowns consistent

See merge request !2781

Geo - Whitelist LFS requests to download objects on a secondary node

Closes #3232

See merge request !2758

* ee/master:
  Remove broken memoization in LicenseHelper#show_promotions?
  Address review comments
  Add settings for minimum key strength and allowed key type (EE)
  Explicitly test if every project id is being synced
  Tune the spec to test the bare minimum
  Geo::RepositySyncWorker should attempt to sync all projects
  Switch out resolver to mitigate SocketError
  Make merge request form dropdowns consistent
  Make go to issue board dropdown style consistent

Add settings for minimum key strength and allowed key type (EE)

See merge request !2776

Protected runner executes jobs on protected branch [Solution 1]

Closes #33281

See merge request !13194

a module, not a class. We should change this to be a module.

Geo::RepositySyncWorker should attempt to sync all projects

Closes #3259

See merge request !2796

Switch out resolver to mitigate SocketError

See merge request !2809

Make merge request form dropdowns consistent

See merge request !2790

Make go to issue board dropdown style consistent

See merge request !2641

* ee/master:
  Move "Move issue" to sidebar - EE merge edition
  Update CHANGELOG.md for 9.5.3
  Update CHANGELOG-EE.md for 9.5.3-ee
  Fix merges not working when project is not licensed for squash
  Extend early adopters feature set
  Fix unsetting credentials data for pull mirrors
  Add icon for billing
  Remove private token.
  Docs: update repo mirroring
  Fixes bug where mirror trigger builds is nil at project create.

Move "Move issue" to sidebar - EE merge edition

Closes gitlab-ce#34261

See merge request !2715