In order to be able to make use of the reference-transaction hook in
Gitaly, the minimum required Git version was bumped to v2.28.0. But due
to a bug in the hook's implementation in git-core it cannot yet be used
reliably, and thus the new requirement doesn't make a lot of sense yet.
So let's remove the requirement and instead make v2.28.0 the recommended
version.

Note that previous requirements were inconsistent. Some parts noted that
Git v2.24.0 is required starting with GitLab 13.1, while other parts
said Git v2.25.0 is required. To avoid a retroactive bump, this commit
adjusts documentation to v2.24.0.

Fix new footer section in template

See merge request gitlab-org/gitlab!38254

Version-app url should be environment specific

Closes #233615

See merge request gitlab-org/gitlab!38883

Update SSH E2E test to push multiple tags and branches

Closes gitlab-org/quality/testcases#962

See merge request gitlab-org/gitlab!39171

- Tests pushing multiple branches and tags together
- Renames the file to be consistent with similar tests
- Makes both smoke tests

Upgrade Pages to 1.22.0

See merge request gitlab-org/gitlab!39172

Create DB table to track changes of the iterations on issues

See merge request gitlab-org/gitlab!37617

Expose epic groupings in boards

See merge request gitlab-org/gitlab!36186

Fix the description of ci merge request ID and IID variables

See merge request gitlab-org/gitlab!38998

Add CSV response helper for controller specs

See merge request gitlab-org/gitlab!39164

Backport spec fixes for upcoming upgrade to Jest 26

See merge request gitlab-org/gitlab!39090

Improve documentation for `job:artifacts:expire_in: never`

Closes #234069

See merge request gitlab-org/gitlab!39078

Add E2E spec for creating confidential epics

See merge request gitlab-org/gitlab!38823

Add changelog

Restore db/structure.sql

Refactor composer api group checks

See merge request gitlab-org/gitlab!38642

Remove EE from supported procedures in Azure documentation

Closes #227860

See merge request gitlab-org/gitlab!38859

Simplify instance_review_permitted? spec

See merge request gitlab-org/gitlab!39163

Danger bot: Apply test label for files related to feature specs

See merge request gitlab-org/gitlab!38804

Update auto-build-image to v0.4.0

See merge request gitlab-org/gitlab!39159

Reorganize group member management into tabs

See merge request gitlab-org/gitlab!38344

Improve git-lfs migrate steps

See merge request gitlab-org/gitlab!38862

[RUN AS-IF-FOSS] RSpec/EmptyLineAfterLetBlock Exceptions in Main area

See merge request gitlab-org/gitlab!38613

Enable the `new_release_page` feature flag by default

See merge request gitlab-org/gitlab!38913

Error tracking setting save button migration

Closes #219905

See merge request gitlab-org/gitlab!39154

Apply changes when moving designs

See merge request gitlab-org/gitlab!39084

This explains why we unconditionally apply this filter, even though it
would appear to do nothing.

Document copying Terraform state between backends

Closes #222380

See merge request gitlab-org/gitlab!38841

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/222380

Add info for HA Postgres and Praefect

Closes gitaly#2991

See merge request gitlab-org/gitlab!38957

The only upstream change is an update of the pack CLI to v0.12.0.

See https://gitlab.com/gitlab-org/cluster-integration/auto-build-image/-/releases/v0.4.0

Compare Gitaly clusters and sharding

See merge request gitlab-org/gitlab!38876