This ports the changes for the CODEOWNERS feature to CE:
- It adds the CODEOWNERS file.
- It adds the mention of the `with-codeowners` branch in TestEnv

Rails 5: fix hashed_path? method that looks up file_location that doesn't exist…

See merge request gitlab-org/gitlab-ce!21510

Add license info of unknown libraries to license_finder configuration instead of direct approval

See merge request gitlab-org/gitlab-ce!21516

Ensure the project has a repository in spec/features/merge_request/user_sees_breadcrumb_links_spec.rb

See merge request gitlab-org/gitlab-ce!21519

Resolve "<link href=""> and <a href=""> not properly filled in activity RSS feed"

Closes #50823

See merge request gitlab-org/gitlab-ce!21424

Make MySQL patch for binary indexes compatible with composite indexes

See merge request gitlab-org/gitlab-ce!21511

[EE-port] Port of EE translations to CE

See merge request gitlab-org/gitlab-ce!21515

Update diff docs regarding where limits are applied

See merge request gitlab-org/gitlab-ce!21504

Limit navbar search for current project or group for small viewports

Closes #18488 and #30214

See merge request gitlab-org/gitlab-ce!18634

Ensure the project has a repository in spec/features/merge_request/user_sees_breadcrumb_links_spec.rb

This backport a fix that was made in https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7240
since the spec would fail there (and not in CE).
Signed-off-by: Rémy Coutable <remy@rymai.me>

Resolve "UI: Move "default branch" setting under "repository" settings"

Closes #36048

See merge request gitlab-org/gitlab-ce!21380

New Crowdin translations

See merge request gitlab-org/gitlab-ee!7223

Resolve "[QA] Orchestrated tests don't run due to wrong tag filters"

Closes #49654 and #50963

See merge request gitlab-org/gitlab-ce!21468

Rails 5: fix hashed_path? method that looks up file_location that doesn't exist when running certain migration specs

Disable project avatar validation if avatar has not changed

Closes #51053

See merge request gitlab-org/gitlab-ce!21506

Every time a column in the projects table is changed, the Avatarable concern
would validate that the avatar file size was under 200K.  This not only delays
the database changes, but it also can lead to unrelated failures if the HTTP
request fails for some reason.

Closes #51053

Update rubyzip gem to 1.2.2 (CVE-2018-1000544)

Closes #50930

See merge request gitlab-org/gitlab-ce!21460

Signed-off-by: Rémy Coutable <remy@rymai.me>

Feature/new merge breadcrumbs

See merge request gitlab-org/gitlab-ce!21502

Add gitaly_calls to API structured logs

See merge request gitlab-org/gitlab-ce!21496

Merge branch 'docs-50155-user-added-as-a-reporter-can-not-edit-labels-on-merge-requests' into 'master'

Clarify roles with permission to label Merge Requests

Closes #50155

See merge request gitlab-org/gitlab-ce!21166

Add search to group labels page

See merge request gitlab-org/gitlab-ce!21480

fixes breadcrumbs on new issue page. adds link to issues page.

Closes #50209

See merge request gitlab-org/gitlab-ce!21305

- Updates specs accordingly
- Updates docs accordingly
- Brews a fresh pot

Conditional partial rendering for EE in application settings

See merge request gitlab-org/gitlab-ce!21482

Rails 5: include opclasses in rails 5 schema dump

See merge request gitlab-org/gitlab-ce!21416

Migrate job artifacts data from `ci_builds` to `ci_job_artifacts` table (with Background migrations)

Closes #46652

See merge request gitlab-org/gitlab-ce!18615

[QA] Add a new Test::Sanity::Failing scenario that always fails

Closes gitlab-qa#28

See merge request gitlab-org/gitlab-ce!21477

Merge branch '50991-qa-page-shared-clonepanel-should-be-moved-to-page-component-clonepanel-qa' into 'master'

Resolve "[QA] Page::Shared::ClonePanel should be moved to Page::Component::ClonePanel"

Closes #50991

See merge request gitlab-org/gitlab-ce!21479

Restrict reopening locked issues for non authorized issue authors

Closes #39665

See merge request gitlab-org/gitlab-ce!21299

doc/job_traces.md: the file is job.log

See merge request gitlab-org/gitlab-ce!21360