Port the SAST DAST doc examples from EE to CE

Closes #42007

See merge request gitlab-org/gitlab-ce!16430

Fix duplication in API::CircuitBreakers

See merge request gitlab-org/gitlab-ce!16456

dynamic imports for projects:e/f/i

See merge request gitlab-org/gitlab-ce!16417

Resolve "Count query for issues and MRs runs twice on group index"

Closes #41546

See merge request gitlab-org/gitlab-ce!16314

Fixing request json mime type

Closes #41598

See merge request gitlab-org/gitlab-ce!16427

Refactor dispatcher for snippets:*

See merge request gitlab-org/gitlab-ce!16390

Refactor dispatcher project mr index path

Closes #41341

See merge request gitlab-org/gitlab-ce!16399

Log and send a system hook if a blocked user attempts to login

Closes #41633

See merge request gitlab-org/gitlab-ce!16451

Refactor dispatcher project branches create path

See merge request gitlab-org/gitlab-ce!16380

Improve after_script docs in yaml/README.md

See merge request gitlab-org/gitlab-ce!16444

Migrate Repository#can_be_merged? to Gitaly

Closes gitaly#893

See merge request gitlab-org/gitlab-ce!16316

Closes #41633

Resolve "Use toggle for subscribed/unsubscribed to notifications"

Closes #16988

See merge request gitlab-org/gitlab-ce!16408

Rename ~Prometheus to ~Monitoring

See merge request gitlab-org/gitlab-ce!16442

fix gitlab-org/gitlab-ce#41891 (design nitpick)

Closes #41891

See merge request gitlab-org/gitlab-ce!16383

Display related merge requests in commit detail page

Closes #2383

See merge request gitlab-org/gitlab-ce!13713

Refactor projects:l*

See merge request gitlab-org/gitlab-ce!16393

Move row containing Projects, Users and Groups count to the top

Closes #40492

See merge request gitlab-org/gitlab-ce!16421

Generalize protected branch/tag dropdowns -- CE backport

See merge request gitlab-org/gitlab-ce!16420

Introduce PredicateMemoization cop

Closes #41731

See merge request gitlab-org/gitlab-ce!16329

* upstream/master:
  Docs: move article "Autoscaling Runners on AWS" to its topic-related dir
  Update missing API documentation on `GET /users/:id/projects`
  Docs: remove duplicate CI examples
  Only search for MR revert commits on notes after MR was merged
  Added .rej files to gitignore
  Fixed performance of projects dropdown
  Add a note about GitLab QA page objects validator to docs
  Refactor dispatcher projects blame and blob path
  Fix Ctrl+Enter keyboard shortcut saving comment/note edit
  Fix boolean prop being provided as string
  Fixes minor aspects on Prometheus description
  Refactor dispatcher project branches path
  Use simple Next/Prev paging for jobs to avoid large count queries on arbitrarily large sets of historical jobs
  Update the grpc gem to 1.8.3