Enable pipeline security summary feature flag

See merge request gitlab-org/gitlab!54673

This should allow users to view security scan
summary in pipeline view

Merge branch '273292-fy21q4-foundations-kr2-audit-and-update-buttons-on-sessionscontroller-new' into 'master'

Audit and update buttons on SessionsController#new

See merge request gitlab-org/gitlab!53254

Add stages to mock pipeline in fixture

See merge request gitlab-org/gitlab!54467

Resolve "Remove nil values from snippets blobs"

See merge request gitlab-org/gitlab!54552

Fix wording in Danger when warning about number of lines changed

See merge request gitlab-org/gitlab!54663

Merge branch 'kerrizor/replace-delegated-predicate-methods-with-boolean-returning-ones-on-mrs' into 'master'

Prefer explicit methods over delegates for predicates

See merge request gitlab-org/gitlab!54610

Reassign pages from Source Code to Code Review

See merge request gitlab-org/gitlab!53785

These pages were all part of the Source Code group, but I believe
they should be reassigned to the new(-ish) Code Review group.

Clarify stop job required keywords as it relates to rules

See merge request gitlab-org/gitlab!52439

Fix selected item not being highlighted in the new group boards

See merge request gitlab-org/gitlab!53113

Because board_card.vue component will be removed in the future
and is not used in the new boards that uses graphql,
we are renaming it to `board_card_deprecated.vue`.

Cross link between code coverage topics

See merge request gitlab-org/gitlab!54770

Update path to AutoDevops admin settings in docs

See merge request gitlab-org/gitlab!54768

Add creator to custom emoji

See merge request gitlab-org/gitlab!53879

Add dotnet coverage example

See merge request gitlab-org/gitlab!54057

Add ruby to documentation as supported language in SAST

See merge request gitlab-org/gitlab!54728

Docs: Fix customers link

See merge request gitlab-org/gitlab!54722

Reset templates cache key

See merge request gitlab-org/gitlab!54614

It may have moved at some point without updating the docs; it's findable
as is (with some guesswork) but this makes it clearer

Update Gitaly version

See merge request gitlab-org/gitlab!54761

Update Gitaly version

See merge request gitlab-org/gitlab!54759

Un-quarantine export project e2e test on staging

See merge request gitlab-org/gitlab!54659

Return only supported issue types for selected Jira Project

See merge request gitlab-org/gitlab!53705

This change improves the way we fetch available issue types for Jira.
From now we will fetch only these types that are available in the
workflow for given project instead of loading all possible issue types
from the system.

External link fixes for docs

See merge request gitlab-org/gitlab!54741

Send SIGINT instead of SIGQUIT to puma

See merge request gitlab-org/gitlab!54446

Fix Metric tab not showing up on operations page

See merge request gitlab-org/gitlab!54736

Apply new GitLab UI for request email button

See merge request gitlab-org/gitlab!53966

Rename indexes on GitLab.com

See merge request gitlab-org/gitlab!51011

Puma does not handle SIGQUIT [1], so worker processes will not get
terminated when calling /etc/init.d/gitlab stop

[1] https://github.com/puma/puma/blob/master/docs/signals.md