Add translatable strings to wiki pages

See merge request gitlab-org/gitlab-ce!14534

Merge branch '36631-activerecord-statementinvalid-pg-querycanceled-error-canceling-statement-due-to-statement-timeout' into 'master'

Insert at most 1,000 rows at once in MR diff background migration

Closes #36631 et #37505

See merge request gitlab-org/gitlab-ce!13661

Updated All Navigation Icons to Sprite_Icons

See merge request gitlab-org/gitlab-ce!14559

Use backend-provided page title in repo editor

Closes #36029

See merge request gitlab-org/gitlab-ce!13763

Tell community members to ping PM when working on an issue

See merge request gitlab-org/gitlab-ce!14571

Make Repository#has_visible_content more efficient

See merge request gitlab-org/gitlab-ce!14554

Fix notes type created from import

Closes #38432

See merge request gitlab-org/gitlab-ce!14524

The first attempt didn't migrate all rows on GitLab.com, due to a couple of
issues:

1. Some rows in merge_request_diffs had truly huge numbers of commits and diffs
   serialised - one in particular had 26,000 commits!
2. The jobs were sometimes on Sidekiq hosts with frequent OOM errors, leading to
   the job being lost.

The previous commit adds more logging, and a more robust insertion method. This
commit reschedules the jobs, with a generous pause between each.

This version does not use transactions, but individual statements. As we have
unique constraints on the target tables for the inserts, we can just ignore
uniqueness violations there (as long as we always insert the same batch size, in
the same order).

This means the spec now must use truncation, not a transaction, as the
uniqueness violation means that the whole transaction for that spec would be
invalid, which isn't what we'd want. In real-world use, this isn't run in a
transaction anyway.

This commit also wraps unhandled exceptions, for easier finding in Sentry, and
logs with a consistent format, for easier searching.

We were hitting the statement timeout for very large MR diffs. Now we insert at
most 1,000 rows to `merge_request_diff_commits` in a single statement, or 100
rows to `merge_request_diff_files`.

Add index for merge_requests.merge_commit_sha

Closes #38507

See merge request gitlab-org/gitlab-ce!14549

Tweaked the first time contributor tooltip text

See merge request gitlab-org/gitlab-ce!14565

Fix Auto DevOps banner feature flag

Closes #38576

See merge request gitlab-org/gitlab-ce!14576

Fixed breadcrumb title not linking

Closes #38059

See merge request gitlab-org/gitlab-ce!14532

Remove target dd

Closes #38485

See merge request gitlab-org/gitlab-ce!14558

Add active states to nav bar counters

Closes #37335

See merge request gitlab-org/gitlab-ce!14569

Fixes data parameter not being sent in ajax request for jobs log

Closes #38528

See merge request gitlab-org/gitlab-ce!14564

Guidelines for illustrations

See merge request gitlab-org/gitlab-ce!13097

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

Closes gitaly#601

See merge request gitlab-org/gitlab-ce!14500

Closes gitaly#601

Migrate Git::Repository#rm_tag to Gitaly

Closes gitaly#562

See merge request gitlab-org/gitlab-ce!14388

Closes gitaly#562

RepoEditor: Prevent extra network call for already opened files.

Closes #38256

See merge request gitlab-org/gitlab-ce!14489

Docs: Feature overview and use cases

Closes #38076

See merge request gitlab-org/gitlab-ce!14538

Docs: crosslink Pages guides

Closes #38427

See merge request gitlab-org/gitlab-ce!14542

Clear merge requests counter cache after merge

Closes gitlab-ee#3573 and #38344

See merge request gitlab-org/gitlab-ce!14563