Fix Route validation when conflicting permanent redirects exist

Closes gitlab-com/support-forum#2883 and #41786

See merge request gitlab-org/gitlab-ce!16397

Resolve "Subscribe button tooltip on issues page causes visual stuttering"

Closes #37077

See merge request gitlab-org/gitlab-ce!16411

Add reason to keep postgresql 9.2 for CI

See merge request gitlab-org/gitlab-ce!16277

Migrate rebase_in_progress? to Gitaly

Closes gitaly#866

See merge request gitlab-org/gitlab-ce!16286

Migrate Gitlab::Git::Repository#rebase to Gitaly

Closes gitaly#863

See merge request gitlab-org/gitlab-ce!16259

Remove warning noise in ProjectImportOptions

See merge request gitlab-org/gitlab-ce!16410

Refactor dispatcher dashboard mr path

See merge request gitlab-org/gitlab-ce!16360

Squlches these warnings:

```
/opt/gitlab/embedded/service/gitlab-rails/app/workers/concerns/project_import_options.rb:5: warning: already initialized constant ProjectImportOptions::IMPORT_RETRY_COUNT
/opt/gitlab/embedded/service/gitlab-rails/app/workers/concerns/project_import_options.rb:5: warning: previous definition of IMPORT_RETRY_COUNT was here
```

Refactor dispatcher project boards path

See merge request gitlab-org/gitlab-ce!16374

Improve wording about additional costs with Ingress on GKE or custom clusters

Closes #41163

See merge request gitlab-org/gitlab-ce!16370

Fix padding for pipeline dropdowns after bad merge

Closes #41221

See merge request gitlab-org/gitlab-ce!15982

Tidy up main JS file

See merge request gitlab-org/gitlab-ce!16007

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/41163

Resolve "Document rsync as requirement for 10.4"

Closes #41607

See merge request gitlab-org/gitlab-ce!16252

This reverts commit 3576d59a.

Docs: move article "Laravel and Envoy w/ CI/CD"

See merge request gitlab-org/gitlab-ce!16359

Docs: move GitLab/Openshift article to its topic-related dir

See merge request gitlab-org/gitlab-ce!16367

Port gitlab-ee MR 3981 to CE

See merge request gitlab-org/gitlab-ce!16371

Fix external links in Snippets API documentation

See merge request gitlab-org/gitlab-ce!16385

Recommend against the use of EFS

See merge request gitlab-org/gitlab-ce!16395

Refactored profile:* and help:* imports in dispatcher

See merge request gitlab-org/gitlab-ce!16330

Adds Rubocop rule for line break around conditionals

Closes #18040

See merge request gitlab-org/gitlab-ce!15739

[ci skip]

Filter out build traces from logged parameters

Closes #41906

See merge request gitlab-org/gitlab-ce!16375

Refactored project:n* imports in dispatcher.js

See merge request gitlab-org/gitlab-ce!16382

Remove soft removals related code

Closes #37447

See merge request gitlab-org/gitlab-ce!15789

Merge branch '40920-emphasize-irreversibility-in-warning-message-when-promoting-labels-and-milestones' into 'master'

Emphasize irreversibility in warning message when promoting labels and milestones

Closes #40920

See merge request gitlab-org/gitlab-ce!16333