Fix slow Markdown rendering

Closes #49409

See merge request gitlab-org/gitlab-ce!20820

[11.1] Escapes milestone title shown in flash message when promoting a milestone

See merge request gitlab/gitlabhq!2443

[11.1] Fixed XSS in branch name in Web IDE

See merge request gitlab/gitlabhq!2446

[11.1] Escapes job name used in tooltips in vue components

See merge request gitlab/gitlabhq!2428

[11.1] Missing CSRF in System Hooks

See merge request gitlab/gitlabhq!2444

[11.1] Don't expose project names in various counters

See merge request gitlab/gitlabhq!2445

[ci skip]

Update merge_request.png in docs

See merge request gitlab-org/gitlab-ce!20730

Update docs milestones

See merge request gitlab-org/gitlab-ce!20731

Merge branch '48745-project-exports-fail-when-uploads-have-been-migrated-to-object-storage' into 'master'

Resolve "Project exports fail when uploads have been migrated to object storage"

Closes #48745

See merge request gitlab-org/gitlab-ce!20484

Add missing Gitaly branch_update nil checks

Closes #49263

See merge request gitlab-org/gitlab-ce!20711

Fix filename for accelerated uploads

See merge request gitlab-org/gitlab-ce!20672

[ci skip]

Render MR page when no persisted diff_refs or diffs size

Closes #49342

See merge request gitlab-org/gitlab-ce!20680

Resolve "MR: Reduce the memory footprint of the component tree"

Closes #48964

See merge request gitlab-org/gitlab-ce!20448

Merge branch '49257-metrics-drop-down-doesn-t-show-all-environment-some-not-clickable' into 'master'

Resolve "Metrics drop down doesn't show all environment, some not clickable"

Closes #49257

See merge request gitlab-org/gitlab-ce!20651

Resolve "Pipeline graph in new merge request widget is flickering"

Closes #49165

See merge request gitlab-org/gitlab-ce!20660

Resolve "Disable GCP free credit banner at instance level"

Closes #48578

See merge request gitlab-org/gitlab-ce!20379

Resolve "NoMethodError: undefined method `namespace' for nil:NilClass"

Closes #49061

See merge request gitlab-org/gitlab-ce!20615

Add the CI Job trigger as the build trigger

Closes charts/gitlab#586

See merge request gitlab-org/gitlab-ce!20619

Fix symlink vulnerability in project import

See merge request gitlab/gitlabhq!2435

QA: Remove flaky and redundant expectations

Closes #49164

See merge request gitlab-org/gitlab-ce!20616

Fix RSS button interaction on Dashboard, Project and Group activities

Closes #48894

See merge request gitlab-org/gitlab-ce!20549

Remove healthchecks from prometheus endpoint

Closes #49112

See merge request gitlab-org/gitlab-ce!20565

Add a fast_timeout for the `ServerService.ServerInfo` endpoint

Closes #49116

See merge request gitlab-org/gitlab-ce!20552

Fix performance problem of tags query

Closes gitlab-com/infrastructure#4550

See merge request gitlab-org/gitlab-ce!20555

Backport mr widget changes from EE

See merge request gitlab-org/gitlab-ce!20598

Merge branch '49021-preserve-test-run-artifacts-when-running-gitlab-qa-multiple-times' into 'master'

Resolve "Preserve test run artifacts when running gitlab-qa multiple times"

Closes #49021

See merge request gitlab-org/gitlab-ce!20495

Resolve "Improve performance of MR Changes tab: reduce event listeners on scroll event"

Closes #48639 and #48789

See merge request gitlab-org/gitlab-ce!20558

Resolve "QA: False failure on QA test "Push to protected branch when allowed" during staging failover rehearsal"

Closes #48241

See merge request gitlab-org/gitlab-ce!20561