Old cache key was: `projects/#{id}/pipeline_status/#{sha}`
New one is: `project:#{id}:pipeline_status:#{sha}`

This allows to delete any project related key just by scanning for:
`project:#{id}`.

Previously, project cache used as part of the namespace the `full_path`,
which included namespace and project slug.

That meant that anytime a project was renamed or transfered to a
different namespace, we would lose the existing cache. This is not
necessary, nor desired.

I've prefixed cache key with `project:` to make it easy to find in redis
if necessary as well as make it possible to purge all project related
cache.

I've also switched the cache key type to go after the initial namespace
and not before.

Add information on support for git v2 in docs

See merge request gitlab-org/gitlab-ce!23138

Update architecture.md to have a component by component overview

See merge request gitlab-org/gitlab-ce!22472

Add missing `performance` to changelog type doc

See merge request gitlab-org/gitlab-ce!22733

Validate that foreign keys are indexed and created

Closes #50875

See merge request gitlab-org/gitlab-ce!22808

Resolve "Allow pipelines to be deleted by project owners"

Closes #41875

See merge request gitlab-org/gitlab-ce!22988

Rename diffs store variable

See merge request gitlab-org/gitlab-ce!23123

Replace weight icon

See merge request gitlab-org/gitlab-ce!23144

Refactor how a few ActiveRecord enums are defined

See merge request gitlab-org/gitlab-ce!23024

Fixed image discussion styling

Closes #54110

See merge request gitlab-org/gitlab-ce!23127

Object storage docs are not relevant to GitLab.com and is in Core

See merge request gitlab-org/gitlab-ce!22943

Fix punctuation error

See merge request gitlab-org/gitlab-ce!22345

Resolve "Upgrade Helm Tiller Version Used By GitLab Managed Apps"

Closes #49726

See merge request gitlab-org/gitlab-ce!22693

Merge branch '54011-all-files-named-index-have-their-content-rendered-as-if-they-were-text-files' into 'master'

Resolve "All files named `index.*` have their content rendered as if they were text files"

Closes #54011

See merge request gitlab-org/gitlab-ce!23063

Use Nokogiri as the ActiveSupport XML backend

Closes #54068

See merge request gitlab-org/gitlab-ce!23136

Add glob for CI changes detection

See merge request gitlab-org/gitlab-ce!23128

Fix typos in lib

See merge request gitlab-org/gitlab-ce!23106

Resolve "Can merge branch before build is started"

Closes #28682

See merge request gitlab-org/gitlab-ce!22911

Backport ServiceHook#execute from EE

See merge request gitlab-org/gitlab-ce!23122

Fixes the styling of image discussions after the discussion styling
changes.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/54110

Add markdown support information for project settings

See merge request gitlab-org/gitlab-ce!23081

Docs eks update

See merge request gitlab-org/gitlab-ce!23133

Fix typo pipline to pipeline

See merge request gitlab-org/gitlab-ce!23129

Fix bug in Gitlab::Checks::CommitCheck

See merge request gitlab-org/gitlab-ce!23045

This significantly improves performance and reduces memory consumption
when parsing XML files. On a test with 124 JUnit files from a CE build,
there was about a 4x reduction in processing time.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/54068

fix typo addres to address

See merge request gitlab-org/gitlab-ce!23108