Fix sub-second timing comparison error for Devise confirmation period

Closes gitlab-ee#2362

See merge request !11156

Update gitignore, dockerfile, and license templates for 9.2

See merge request !11158

Add documentation about adding foreign keys

See merge request !11117

[ci skip]

Update the vendor licenses file for 9.2

See merge request !11159

clarify DB/Redis HA docs

See merge request !11094

New doc topic: issues

Closes #27650

See merge request !11075

Add confirm delete protected branch modal

Closes #21393

See merge request !11000

Omit gl_project_id from Import/Export

Closes #29813

See merge request !11032

On databases such as MySQL, it's possible to get into a timing comparison
error if the value of `Confirmable#confirmation_sent_at` is within a second
of `0.days.ago`. This is possible mostly in specs that test this behavior
and most likely not happening in practice. The result of this error causes
a user to be deemed active when it should be inactive. To prevent this
error, we explicitly check the configuration setting to be `0.days.ago`.

Closes gitlab-org/gitlab-ee#2362

Add support for commit diff ignore_whitespace_change and paths flags

Closes gitaly#198

See merge request !11028

Revert "Merge branch 'fix-rspec_profiling-establish_connection-string-deprecation' into 'master'"

See merge request !11153

Add Pipeline Schedules that supersedes experimental Trigger Schedule

Closes #30882

See merge request !10853

This reverts merge request !11150

Another attempt at access_control_ce_spec

Closes #31827

See merge request !11123

Cast ENV['RSPEC_PROFILING_POSTGRES_URL'] to symbol in establish_connection call …

See merge request !11150

Closes gitaly#198

Correctly stub application settings in signup_spec.rb

See merge request !11151

Rewrite Pipeline Graph in Vue.js to allow realtime

Closes #25226 and #31557

See merge request !10878

Cast ENV['RSPEC_PROFILING_POSTGRES_URL'] to symbol in establish_connection call of rspec_profiling.rb

* master: (40 commits)
  Use GitLab Pages v0.4.2
  Do not reprocess actions when user retries pipeline
  Add specs for extended status for manual actions
  Refine inheritance model of extended CI/CD statuses
  Introduce generic manual action extended status class
  Check ability to update build on the API resource
  Require build to be present in the controller
  Authorize build update on per object basis
  Use update build policy instead of new play policy
  Improve environment policy class
  Rephrase documentation for protected actions feature
  Improve code style related to protected actions
  Add changelog entry for external env URL btn fix
  Hide environment external URL button if not defined
  Fix builds controller spec related to protected actions
  Fix environment policy class name in specs
  Add Changelog entry for protected manual actions
  Document protected manual actions feature
  Improve specs for jobs API regarding manual actions
  Fix Rubocop offense in environments policy class
  ...

Check access to a branch when user triggers manual action

Closes #20261

See merge request !10494

Hide environment external URL button if not defined

Closes #30832

See merge request !11029

Use GitLab Pages v0.4.2

See merge request !11131

Single commit squash of all changes for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10878

It's needed due to https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10777 being merged with squash.

Real time pipeline show action

Closes #25226

See merge request !10777