Resolve "Improve Web IDE launch performance"

Closes #53336

See merge request gitlab-org/gitlab-ce!25700

**How?**
Previously the files_decorator inserted parent folders inefficiently.
It started at the first part and ensured each was inserted.

Since the file entries are given to use in alphabetical order, we can
start at the last part of the blob's parents. If this exists, we can
short circuit and be done inserting parents.

**What else?**
- Improve performance of decorateData. The object spread operator is
not needed because the object is brand new.

Add Auto DevOps build job for tags

See merge request gitlab-org/gitlab-ce!25718

Disable gitlab:ui:visual for documentation changes

See merge request gitlab-org/gitlab-ce!25847

Handle transformed notes from polling response

See merge request gitlab-org/gitlab-ce!25792

Add feature flag for FindAllTags

See merge request gitlab-org/gitlab-ce!25615

Update to GitLab Shell 8.7.1

See merge request gitlab-org/gitlab-ce!25801

Provide ee backports related to approver filtering

See merge request gitlab-org/gitlab-ce!24982

Adds custom validator for ArrayNoneAny param
Extracts some logic in js into separate files

De-quarantine CI env var spec

Closes gitlab-org/quality/staging#43

See merge request gitlab-org/gitlab-ce!25841

Display Recent Boards in Board switcher

See merge request gitlab-org/gitlab-ce!25696

CE Update project settings section titles and info

See merge request gitlab-org/gitlab-ce!25817

Retry choose_test_namespace on exception

Closes gitlab-org/quality/staging#42

See merge request gitlab-org/gitlab-ce!25810

- Extract 445px as a variable
- Documentation changes: new image and update copy

Docs: Add missing redirects to /user and /project_services docs

See merge request gitlab-org/gitlab-ce!25799

Docs: Update upgrading_from_source.md for Ruby 2.5

See merge request gitlab-org/gitlab-ce!25814

Update the documented version requirement of Ruby inside of Upgrading
from Source to show GitLab 11.8 needs Ruby 2.5

Update using_docker_build.md

Closes #58556

See merge request gitlab-org/gitlab-ce!25779

Backport security-reports fixtures to CE

See merge request gitlab-org/gitlab-ce!25828

Docs: Adding Package Repository Permissions to permissions.md

See merge request gitlab-org/gitlab-ce!24676

CE FE Refactor PersistentUserCallout instantiation

See merge request gitlab-org/gitlab-ce!25484

Allow all snippets to be accessed by API

Closes #41888

See merge request gitlab-org/gitlab-ce!25772

Fix exports related to new templates

Closes #58570

See merge request gitlab-org/gitlab-ce!25794

This reverts commit 669d84356771682961ac6c416c3cbdb983ec0cd2

Fix typo in review-performance job

See merge request gitlab-org/gitlab-ce!25821

This reverts commit c9ecc71a, reversing
changes made to c3c8dbf8.

Adds Rubocop ReturnNil cop

Closes #57454

See merge request gitlab-org/gitlab-ce!25034

Allow GraphQL requests without CSRF token

Closes #57237

See merge request gitlab-org/gitlab-ce!25719

Improve wording of project settings section
headers.
Improve order of sections.
Adds section toggling by section title.
Translates section titles and descriptions.

Document ChatOps for actor feature gates

See merge request gitlab-org/gitlab-ce!25815

Quarantine failing ssh key test

See merge request gitlab-org/gitlab-ce!25813

Quarantine: Update failure issue link

See merge request gitlab-org/gitlab-ce!25811

This style change enforces `return if ...` instead of
`return nil if ...` to save maintainers a few minor review points

The documentations only covered the percentage based feature gates.
These don't work really well for a number of reasons, for example; a new
visual element in GitLab would be weird to see only 25% of the time.

Allowing feature gates based on projects and groups has been supported,
now it's documented.