For merge requests created after 9.4, we have a `merge_request_diff_commits`
table we can get all the SHAs from very quickly. We just need to exclude these
when we load from the legacy format, by ignoring diffs with no serialised
commits.

Once these have been migrated in the background, every MR will see this
improvement.

Update VERSION to 9.4.0-pre.

See merge request !12702

Extend MR tabs a bit to cover up the avatar holder and collapse icon on scroll

Closes #34153

See merge request !12589

Don't show auxiliary blob viewer for README when there is no wiki

Closes #34732

See merge request !12689

Upgrade GitLab Pages to v0.5.0

See merge request !12625

Fix some N+1 queries in the GET /projects API

Closes #33748

See merge request !12679

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

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

Fix shorter route helpers in production environment

Closes #34741

See merge request !12675

Upgrade GitLab Workhorse to v2.3.0

See merge request !12676

Remove orphaned haml files

Closes #34779

See merge request !12690

Improve & fix the performance bar UI and behavior

Closes #33910, #33914, and #33909

See merge request !12361

Fix markdown preview tooltip cut off issue

Closes #31748

See merge request !12367

Add table for merge request commits

Closes #30224

See merge request !12527

Just draw :legacy_builds

Closes #34702

See merge request !12681

34727 Remove two columned layout from project member settings

Closes #34727

See merge request !12663

Resolve "`label` field for setting a chart's legend text is not working"

Closes #34655

See merge request !12628

This is an ID-less table with just three columns: an association to the merge
request diff the commit belongs to, the relative order of the commit within the
merge request diff, and the commit SHA itself.

Previously we stored much more information about the commits, so that we could
display them even when they were deleted from the repo. Since 8.0, we ensure
that those commits are kept around for as long as the target repo itself is, so
we don't need to duplicate that data in the database.

Limit the file tree view container width

Closes #34670

See merge request !12643

Add GitLab Runner Helm Chart documenation for custom certificates

See merge request !12594

Re-enable polling for environments

See merge request !12678

Backport Service changes from https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2259

See merge request !12653

Cleanup minor UX issues in the performance dashboard

Closes #34653

See merge request !12635

Revert "Merge branch 'winh-mr-widget-no-pipeline' into 'master'"

See merge request !12674

Backports for ee-2112

Closes #34716

See merge request !12671

Add Traditional Chinese in Taiwan translations of Commits Page

See merge request !12407

Generate KUBECONFIG in KubernetesService#predefined_variables

Closes #33360

See merge request !12223

Fix `migration:path` build for "Honor the 'Remember me' parameter for OAuth-based login"

Closes #34713

See merge request !12668

Add foreign keys to various tables that point to the "projects" table

See merge request !9388