Closes https://gitlab.com/gitlab-com/migration/issues/766

When backend sends HTML it requires frontend to append it to the DOM causing
XSS vulnerabilities. By removing the `<br>` we avoid those vulnerabilities

Backport `Repository#keep_around` changes from EE to CE

See merge request gitlab-org/gitlab-ce!21290

Change large scale to production

See merge request gitlab-org/gitlab-ce!21331

Merge branch '50441-high-number-of-statement-timeouts-in-groupdestroyworker-due-to-sitestatistics' into 'master'

Resolve "High number of statement timeouts in GroupDestroyWorker due to SiteStatistics"

Closes #50441

See merge request gitlab-org/gitlab-ce!21366

Fix static analysis

See merge request gitlab-org/gitlab-ce!21402

Rails5: fix can't quote ActiveSupport::HashWithIndifferentAccess

See merge request gitlab-org/gitlab-ce!21397

Allow date parameters on Issues, Notes, and Discussions API for group owners

Closes #40059

See merge request gitlab-org/gitlab-ce!21342

Display default status emoji if only message is entered

Closes #50067

See merge request gitlab-org/gitlab-ce!21330

Resolve "It's impossible to commit twice to the same branch"

Closes #50584

See merge request gitlab-org/gitlab-ce!21372

Expose user's id in /admin/users/ show page.

See merge request gitlab-org/gitlab-ce!21297

Creates vue component for environments block

See merge request gitlab-org/gitlab-ce!21279

Allow to delete group milestones

Closes #36138

See merge request gitlab-org/gitlab-ce!21057

Resolve "Size of checkout branch modal box is too small"

Closes #43625

See merge request gitlab-org/gitlab-ce!21381

Add Galician as an available language

Closes #43227

See merge request gitlab-org/gitlab-ce!21202

Resolve "[QA] `Test::Instance` doesn't use the correct path to spec files"

Closes #50746

See merge request gitlab-org/gitlab-ce!21394

Signed-off-by: Rémy Coutable <remy@rymai.me>

Compress all PNG images under doc/

See merge request gitlab-org/gitlab-ce!21329

The pngquant tool was used https://pngquant.org, and particularly, the
following command:

        /usr/bin/pngquant -f --skip-if-larger --ext .png --speed 1 image.png

Before: 47584K
After : 34924K

Merge branch '50526-flash-hideflash-sets-transition-style-test-fails-on-master-in-local-environment' into 'master'

Resolve ""Flash hideFlash sets transition style" test fails on master in local environment"

Closes #50526

See merge request gitlab-org/gitlab-ce!21376

Don't use ruby interpolation in externalized strings

Closes #50333

See merge request gitlab-org/gitlab-ce!21247

Add group name badge under group milestone

Closes #49292

See merge request gitlab-org/gitlab-ce!21384

Fix fallback logic for automatic MR title assignment

See merge request gitlab-org/gitlab-ce!20930

Rails5 update Gemfile.rails5.lock

See merge request gitlab-org/gitlab-ce!21388

Bitbucket Server importer: Eliminate most idle-in-transaction issues

See merge request gitlab-org/gitlab-ce!21173

Use slugs for default project path and sanitize names before import

See merge request gitlab-org/gitlab-ce!21367

Just like with the GitHub importer, the Bitbucket Server importer can hit the
default 60 s idle-in-transaction timeouts if it takes too long to create the
merge request. We solve this by using the same approach as the GitHub importer:

1. Bypass all validation and hooks in creating a merge request
2. Insert the Git data in a separate transaction

Part of #50021