Multi-level container registry images

Closes #17801

See merge request !10109

Use config.toml to configure Gitaly

See merge request !10496

Resolve "Add system note icons to profile page"

Closes #29128

See merge request !10387

Merge commit '46e4ed6b' into feature/multi-level-container-registry-images

* commit '46e4ed6b': (28 commits)
  Award emoji button smiley animation
  Introduced empty/error UX states to environments monitoring.
  Github import rake task
  Remove individual modal width styles
  Fix RuboCop for removing index
  Link to docs site for file in doc/
  Disable invalid service templates (again)
  Show CI status as Favicon on Pipelines, Job and MR pages
  STL file viewer
  Wait for the PDF to be loaded before doing anything
  remove unnecessary lease as cron job
  Search for opened MRs - include reopened  MRs
  ProjectsFinder should handle more options
  Clearly show who triggered the pipeline in email
  Make it possible to preview pipeline success/failed emails
  Add remove_concurrent_index to database helper
  Add more tests for subgroups feature
  Large features by the 1st, small ones by the 3rd
  Ask people to create EE MRs on the 7th
  fix project authorizations migration issue
  ...

Linking to edit file directly

Closes #28899

See merge request !10233

Recent search history for issues

Closes #27262

See merge request !10324

Optimise trace handling code to use streaming instead of full read

See merge request !10311

Support 2FA requirement per-group

See merge request !8763

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/27262

Use Gitaly for Environment#first_deployment_for

See merge request !10294

Include endpoint in metrics for ETag caching middleware

See merge request !10495

Resolve "Make modal sizes consistent and mobile friendly"

Closes #29470

See merge request !10088

Fixed user profile tabs causing the page to scroll

Closes #30338

See merge request !10405

Disable invalid service templates (again)

Closes #30024

See merge request !10339

Ask people to create EE MRs on the 7th

See merge request !10371

Add more tests for subgroups feature

See merge request !10486

Prevent Trigger action buttons from wrapping

Closes #29807

See merge request !10186

Award emoji button smiley animation

See merge request !10130

Introduced empty/error UX states to environments monitoring.

Closes #29212

See merge request !10271

Github import rake task

See merge request !10308

Search for opened MRs - include reopened  MRs

Closes #30291

See merge request !10407

Wait for the PDF to be loaded before doing anything

Closes #30531

See merge request !10493

Fix html structure to prevent tooltip from not hidding

Closes #30493

See merge request !10474

Periodically mark projects that are stuck in importing as failed

Closes #17709

See merge request !10207

Add remove_concurrent_index to database helper

Closes #30376

See merge request !10441

Show CI status as Favicon on Pipelines, Job and MR pages

Closes #12818

See merge request !10144