Fix notify_only_default_branch check for Slack service

See merge request !11154

Merge request widget redesign

Closes #25424 and #27950

See merge request !10319

Update guides for 9.2

See merge request !11157

Merge branch '28794-standardize-jasmine-test-describe-block-names-that-test-specific-methods' into 'master'

Resolve "Standardize jasmine test describe block names that test specific methods"

Closes #28794

See merge request !11137

Use regex to skip unnecessary reference processing in ProcessCommitWorker

Closes #28359

See merge request !10867

Fix notes_on_personal_snippets_spec

Closes #31938

See merge request !11160

Add index_redirect_routes_path_for_link migration to setup_postgresql

See merge request !11165

Use absolute URLs for fixtures

See merge request !11133

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 "Installation from Source" guide
- Create an update guide for `9.1` to `9.2`

Update the vendor licenses file for 9.2

See merge request !11159

clarify DB/Redis HA docs

See merge request !11094

Check for all possible timeago strings that can be rendered in a few minutes. We cannot rely on 'less than a minute ago'

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

The notify_only_default_branch property is using boolean_accessor
this means we need to check it using a question methods.
Also add specs for disabling this option.

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