Migrate dirty_submit to Jest

Closes #194229

See merge request gitlab-org/gitlab!30294

Fix typo in file_lock.md

See merge request gitlab-org/gitlab!30366

Fix formatting in Uploads administration

See merge request gitlab-org/gitlab!30138

Fix AttributesRewriter for ResourceMilestoneEvents without milestone

See merge request gitlab-org/gitlab!30475

Added 12.9 link to upgrade specific steps

See merge request gitlab-org/gitlab!30495

Remove PyPI from suggested contributions

See merge request gitlab-org/gitlab!30407

Fix false formatting

See merge request gitlab-org/gitlab!30411

Add troubleshooting advice for HTTP 403

See merge request gitlab-org/gitlab!30077

Docs: Prefer Ubuntu's Git-PPA over source compiling

See merge request gitlab-org/gitlab!30382

Change guidance on 13.0 deprecations to V5

See merge request gitlab-org/gitlab!30482

Test terraform state API using Unicorn::TeeInput

See merge request gitlab-org/gitlab!30334

Create Ops Strategies User Lists Table

See merge request gitlab-org/gitlab!30243

For applying user lists to a feature flag strategy

Enable Vue LFS badge by default

See merge request gitlab-org/gitlab!30469

Refactor to use parseBoolean

See merge request gitlab-org/gitlab!30076

Update Geo Replicable Filter Nav

See merge request gitlab-org/gitlab!29979

Remove duplicate QA attribute for burndown charts

Closes #214686

See merge request gitlab-org/gitlab!29719

Added side margin to Clone button

See merge request gitlab-org/gitlab!30471

Update specs as well

Merge branch '34817-issue-description-reverts-to-an-older-version-when-saving-without-prompting-the-conflict' into 'master'

Updated autosave.js to save a lock version

See merge request gitlab-org/gitlab!29349

Docs: Update due_dates.md with quick actions reference

See merge request gitlab-org/gitlab!30444

Update dependency @gitlab/ui to v13

See merge request gitlab-org/gitlab!30413

Merge branch 'migrate_ee_spec_javascripts_vue_mr_widget_components_performance_issue_body_spec' into 'master'

Migrate ee performance_issue_body_spec to Jest

See merge request gitlab-org/gitlab!30452

[FIXED] Set all NULL `lock_version` values to 0 PART 2

See merge request gitlab-org/gitlab!30305

Migrate project snippets to the ghost user when the user is deleted

See merge request gitlab-org/gitlab!28870

Closes #205772

Refactor package details installation tabs

See merge request gitlab-org/gitlab!29946

Add :sectional_codeowners feature flag

See merge request gitlab-org/gitlab!30311

Add link to customer portal from license dashboard

See merge request gitlab-org/gitlab!30330

On the Snippet view with "Clone" button visible, there's not enough
right margin to comply with Pajamas. This MR fixes this issue.

Rails silently casts NULL `lock_version` values to 0 while doing
optimistic locking, which causes false stale object exceptions. We had a
monkey patch that would change it to check for [NULL, 0] but want to
avoid monkey-patching if possible, which means we need to clean up our
database values.

This Commit is for CI objects (CI Stages, CI Builds, CI Pipelines)

Code Review Analytics: Add filters store

See merge request gitlab-org/gitlab!30361