This changes the load balancing logic so we hijack
`ActiveRecord::Base.connection` instead of hijacking "connection" on a
per model basis. This ensures _all_ code that might use it (including
Rails internals) goes through the database load balancer. This in turn
should make the application more resistant to failures on the primary.

Fixes https://gitlab.com/gitlab-org/gitlab-ee/issues/3191

Fix pipeline quota text not collapsing in the new sidebar

See merge request !2697

Create system notes only if issue was successfully related to another

Closes gitlab-ce#36443

See merge request !2684

Repo editor with flex layout -- EE merge edition

See merge request !2700

Improves handling of the mirror threshold

Closes #3134

See merge request !2671

Add metrics for BitBucket and GitHub API calls

See merge request !2661

Improves handling of stuck projects

Closes #3108

See merge request !2628

Support handling of rename events in Geo Log Cursor

See merge request !2615

Use rugged_is_ancestor? instead of Gitaly when it is called inside a loop

Closes gitlab-com/infrastructure#2138

See merge request !2696

Port of dispatcher-race-condition-fix to EE

See merge request !2643

[EE] Whitelist or fix additional `Gitlab/PublicSend` cop violations

See merge request !2662

Remove ignore column lines

See merge request !2677

[EE] Enable Layout/TrailingWhitespace cop and auto-correct offenses

See merge request !2686

Fix time travelling tests.

See merge request !2691

Fix Copy to Clipboard for SSH Public Key on Pull Repository settings

Closes #3167

See merge request !2692

Fix admin sidebar menu items

Closes #3175

See merge request !2689

Update wording and clarification of approvals

See merge request !2676

Merge branch '36405-fix-mysql-timestamp-columns' into 'master'

Closes gitlab-ce#36405

See merge request !2688

Resolve "Code quality styles missing"

Closes #3162

See merge request !2678

Many Repo Fixes -- EE merge edition

See merge request !2679

Make sure MySQL would not use CURRENT_TIMESTAMP as the default for timestamp columns

Closes #36405

See merge request !13560

CE Upstream - Monday

Closes #3121, gitlab-ce#31706, gitlab-ce#36066, and gitlab-ce#31698

See merge request !2674

Document creating new issue from the group-level Issue Tracker.

Closes gitlab-ce#36375

See merge request !2687

EE counterpart for CE MR !13360

See merge request !2675

Conflicts:
	app/assets/javascripts/repo/components/repo_edit_button.vue
	app/assets/javascripts/repo/components/repo_editor.vue
	app/assets/javascripts/repo/components/repo_tab.vue
	app/assets/javascripts/repo/components/repo_tabs.vue
	app/assets/javascripts/repo/helpers/repo_helper.js
	app/assets/javascripts/repo/services/repo_service.js
	app/assets/javascripts/vue_shared/components/popup_dialog.vue
	app/assets/stylesheets/pages/repo.scss
	app/views/shared/repo/_repo.html.haml
	spec/javascripts/repo/components/repo_edit_button_spec.js