Merge branch '30146-let-s-encrypt-integration-doesn-t-scale-and-does-not-give-any-feedback-to-user-on-errors' into 'master'

Add retry button if we failed to obtain Let's Encrypt certificate

See merge request gitlab-org/gitlab!28128

Default to choosing domain experts for reviewers

See merge request gitlab-org/gitlab!28557

Improve error message in DAST CI template

See merge request gitlab-org/gitlab!29388

When DAST_WEBSITE is not defined in a pipeline, the template will still
attempt to run the analyzer but fail without any explanation.

This change in the template will output an error and a link to the
documentation if the variable is not set.

Match displayed policies

See merge request gitlab-org/gitlab!28862

Add Fluentd docs related to the cluster app page

See merge request gitlab-org/gitlab!29427

Dedupe some SCSS variables

See merge request gitlab-org/gitlab!28296

Use the corresponding color and code instead to make
switching color schemes easier

Note about route conflicts linking to guidelines

See merge request gitlab-org/gitlab!29455

Cleanup E2E Best Practices documentation

See merge request gitlab-org/gitlab!28978

Add client-side validation to Release asset edit form

See merge request gitlab-org/gitlab!28493

Refactor vulnerability header and footer

See merge request gitlab-org/gitlab!28651

Project import Github API rate limit is exceeded

See merge request gitlab-org/gitlab!28785

Migrate ee/ide to Jest

Closes #194288

See merge request gitlab-org/gitlab!28437

Endpoint to create annotations for environments dashboard

See merge request gitlab-org/gitlab!29089

Add annotations post endpoint specs

Add changelog entry

* Remove style from licenes_table_row.vue

Add avoid superfluous expectations section
Add Prefer Commit resource over ProjectPush section
Fix wording in Ensure tests logged in section

Use strong_memoize for external_issue_trackers

See merge request gitlab-org/gitlab!29276

Add support for toast messages on user actions in Requirements

See merge request gitlab-org/gitlab!29472

Copy deployments.cluster_id to deployment_clusters

See merge request gitlab-org/gitlab!26841

Fix flaky Jenkins e2e spec javascript error

See merge request gitlab-org/gitlab!29494

Migrate CE & EE controller specs to consider admin mode

See merge request gitlab-org/gitlab!28770

use .present instead of fabricate
fix typo in the method name
fix specs after rebase

Update QA variables spec

See merge request gitlab-org/gitlab!25924

Also fix view to show `in progress` callout if certificate
is user provided, and show `failed` warning ever if we
have the certificate

+ Add translations

Create project label for jira imported issues

See merge request gitlab-org/gitlab!29246

Enable store_merge_request_line_metrics FF

See merge request gitlab-org/gitlab!29483

Adds support for showing toast messages on
user actions like create, edit, archive & reopen.
Also adds missing license check for nav sidebar
requirements link.