Document end to end flow for Kubernetes and Auto DevOps

Closes #44455

See merge request gitlab-org/gitlab-ce!19699

[Rails5] Force the `protect_from_forgery` callback run first

Closes #48204

See merge request gitlab-org/gitlab-ce!20055

Unify object_storage_spec.rb with EE

See merge request gitlab-org/gitlab-ce!20069

Unify spec/services/auth/container_registry_authentication_service_spec.rb

See merge request gitlab-org/gitlab-ce!20071

Use expect_next_instance_of to replace expect_any_instance_of

See merge request gitlab-org/gitlab-ce!20072

Show a reCAPTCHA on signin page if custom header is set

Closes #48184

See merge request gitlab-org/gitlab-ce!20076

This will only be displayed if `X-GitLab-Show-Login-Captcha` is set as an HTTP
header.

Retroactively add changelogs

See merge request gitlab-org/gitlab-ce!20079

Enable webpack nodeEnv optimization

See merge request gitlab-org/gitlab-ce!20075

For community contributions, changelogs
should be added to the MR.

Fix diff comment alignment for parallel code additions

Closes #47861

See merge request gitlab-org/gitlab-ce!20006

Move boards modal EmptyState vue component

See merge request gitlab-org/gitlab-ce!20068

Fix multiple active tabs when Crowd or LDAP is in use

Closes #48192

See merge request gitlab-org/gitlab-ce!20049

Unify spec/support/shared_examples/features/project_features_apply_to_issuables_shared_examples.rb

See merge request gitlab-org/gitlab-ce!20073

Allow omnibus to disable sourcemaps in memory constrained environments

See merge request gitlab-org/gitlab-ce!20053

Add `gitlab` chart documentation

See merge request gitlab-org/gitlab-ce!20056

CE: Resolve "Extract EE specific files/lines for project_creator_spec"

See merge request gitlab-org/gitlab-ce!19850

Follow-up to !19808: Split up for-loop initializations

See merge request gitlab-org/gitlab-ce!19915

Restore custom hooks for wiki

See merge request gitlab-org/gitlab-ce!20065

Changes tab VUE refactoring

Closes #42882

See merge request gitlab-org/gitlab-ce!17011

[Rails5] Set request.format in commits_controller

Closes #48144 et #48143

See merge request gitlab-org/gitlab-ce!20023

Since Rails 5.0 the `protect_from_forgery` callback doesn't run first by
default anymore. [1]

Instead it gets inserted into callbacks chain where callbacks get
called in order.

This commit forces the callback to run first.

[1]: https://github.com/rails/rails/commit/39794037817703575c35a75f1961b01b83791191

Add enabled prefix to feature keys to be consistent with other keys

See merge request gitlab-org/gitlab-ce!20043

Properly detect label reference if followed by period or question mark

See merge request gitlab-org/gitlab-ce!19965