NOTE: The upgrade is backwards compatible with existing sessions, but
the upgrade of redis-rack v2.1.2 changed Redis keys from
`session:gitlab:<random hex value>` to `session:gitlab:2::<hash of hex
value>`. If a session does not have a key in the new schema, it will be
created transparently. The old session key will eventually be expired
automatically.

To upgrade to rack 2.0.9, we need to do the following:

1. Fix ActiveSession to use new Rack::Session::SessionId
2. Add a monkey patch for ActionController::TestSessionPatch

Controller tests were failing without the changes in
https://github.com/rails/rails/pull/38063, which is available on the
Rails `6-0-stable` branch but not in Rails 6.0.2.2.

3. Remove CGI escaping of ActiveSession keys. This was not needed
because CGI escaping was already being done by Rails.

4. Fix deletion of Rack session keys with ActiveSession

redis-rack v2.1.2 changed the session key from one based on the public
ID to the private ID. We need to adapt ActiveSession to delete both
versions of the key to clear out old data and to make it work with the
redis-rack key name changes.

Merge branch '212654-can-we-remove-the-index-index_ci_builds_on_name_for_security_reports_values' into 'master'

Remove ci_builds security job values index

See merge request gitlab-org/gitlab!28224

Move 26302 changelog to changelogs

See merge request gitlab-org/gitlab!28821

Allow users to assign a serverless domain to Knative (frontend)

See merge request gitlab-org/gitlab!28431

Consume remaining LinkLFsObjectsProjects jobs

See merge request gitlab-org/gitlab!27558

Added shared Clone Dropdown button component

See merge request gitlab-org/gitlab!28781

Fixes flaky spec in`spec/frontend/ide/components/merge_requests/list_spec.js`

See merge request gitlab-org/gitlab!28807

Refactor UpdateDashboardService tests

See merge request gitlab-org/gitlab!28376

Find or initialize instance-level integration

See merge request gitlab-org/gitlab!28592

Update dependency @gitlab/ui to v11.0.1

See merge request gitlab-org/gitlab!28830

Shared component used for cloning functionality on Projects and
Snippets.

Also a new shared 'getBaseProtocol' url utility has been added

Resolve "Remove "Open in file view" in Web IDE"

Closes #199081

See merge request gitlab-org/gitlab!28705

Added snowplow tracking to change direction

See merge request gitlab-org/gitlab!28717

Issue #26426 Drafting a solution for the retrieval of runners that belong to...

See merge request gitlab-org/gitlab!24169

Issue #26426 Drafting a solution for the retrieval of runners that belong to subgroups for the owner of the parent group

Issue #26426 : Using the owned_groups with self_and_descendants to get
all the groups that a user owns even per inheritance of ownership.
Fixing the test case so that it behaves as expected.

Issue #26426 : No need to have two separate cases for group_runners and
subgroup_runners since the subgroups inherit the ownership from the
groups.

Issue #26426 : Improving description of the example.

Issue #26426 : As discussed, get rid of the example extraction and
inline it in the test case.

Issue #26426 : As discussed, adding a test case for inclusion of runners
that belong to groups in which the user is maintainer (and developer).

issue #26426 : Adding reporter and guest to shared examples for
completion.

Issue #26426 : Adding multi-owner, group owner and project owner as
shared examples.

Issue #26426 : Refining the case of group owner.

Issue #26426 : Making all let imperative. Reviewing the cases so that
they're complete.

Issue #26426 : Improving wording on the descriptions of the test. Adding
completion cases tests.

* Removes all instances of mocked throttle from spec
* Removes all instances of mocked debounce from specs
* Adds global helper

Change organization field to `readonly` for GitLab employees

See merge request gitlab-org/gitlab!28151

Tweak Dependency List pipeline subheading text

See merge request gitlab-org/gitlab!28665

This also takes the opportunity to switch to `GlSprintf` for i18n.

Part of [Update dependencies table UI][1].

[1]: https://gitlab.com/gitlab-org/gitlab/-/issues/195928

Show error when Jira did not return any projects

See merge request gitlab-org/gitlab!28752

Change group policy for Group Activity Analytics

See merge request gitlab-org/gitlab!28646

Only allow users who have access to the group, to
be able to access the analytics

Update dependency @gitlab/svgs to v1.117.0

See merge request gitlab-org/gitlab!28570

Change redo for retry icon in metrics dashboard

See merge request gitlab-org/gitlab!28670

Changelog not needed for MRs behind feature flags

`gitlab_employee?` and `:gitlab_employee_badge` were being used
together in multiple places. This combines them into one source of
truth. It also allows us to clean up the HAML templates.

Expose Enabled Replication to API

See merge request gitlab-org/gitlab!28478

Test organization field attributes and `:gitlab_employee_badge`
feature flag

The organization field will be prepopulated with `GitLab` and readonly
for users with a `@gitlab.com` email

FE Remove redundant mocking docs

See merge request gitlab-org/gitlab!28056

Remove incomplete and duplicate spec from changelog specs

See merge request gitlab-org/gitlab!28801