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

Resolve "!15665 consistently 502s because it fetches every commit"

Closes #41807

See merge request gitlab-org/gitlab-ce!16320

Docs: move article "Autoscaling Runners on AWS" to its topic-related dir

See merge request gitlab-org/gitlab-ce!16368