Move jest spec helpers to own directory

See merge request gitlab-org/gitlab!51598

It is a bit confusing as we have put helpers to be used in specs in the
same directory as specs for `app/assets/javascripts/helpers`. In oder
to make the destinction a bit more clear, this moves jest test helpers
to `__helpers__` and adds appropriate readmes to both folders.

Add gl-mt-3 to no schedules nothing-here-block

See merge request gitlab-org/gitlab!51551

Add Packages::Debian::DistributionFinder

See merge request gitlab-org/gitlab!51266

Migrate the bs-callout class to gl-alert in ancestor notice

See merge request gitlab-org/gitlab!51209

Uploading metric images to incidents - docs

See merge request gitlab-org/gitlab!50044

Reduce pixel size of images, then run through pngquant to compress
file size on disk. Also provide documentation edits for tone / style.

Add warning to the branch chooser

See merge request gitlab-org/gitlab!51671

Remove the `incident_metric_upload_ui` feature flag

See merge request gitlab-org/gitlab!51552

Refactor Promote Milestone Modal

See merge request gitlab-org/gitlab!51227

This refactors the "Promote Milestone Modal", replacing DeprecatedModal2
with GlModal. The way the modal is triggered, is changed from an
event-bus based solution to one which is "pure" Vue, simplifying the
code quite a bit. We moved most of the logic from the init function over
to the modal itself. Tests have been adjusted.

Fixed broken links

See merge request gitlab-org/gitlab!51535

Related to: https://gitlab.com/gitlab-org/technical-writing/-/issues/353

Adds docs about agent testing locally

See merge request gitlab-org/gitlab!51641

Revise the provided text for tone and style, reducing several
subheadings to a single unordered list, while keeping a longer
explanation in a subheading.

Pipeline Graph Structural Update: Links Cleanup MR

See merge request gitlab-org/gitlab!51688

Includes new component, specs

Fixed docs- title field in alerts is not required

See merge request gitlab-org/gitlab!51741

[RUN ALL RSPEC] Autocorrect more keyword warnings

See merge request gitlab-org/gitlab!51514

Cloud License: Subscription activation service

See merge request gitlab-org/gitlab!51450

Part of Cloud License feature

Add explicit instructions for maximum job timeout

See merge request gitlab-org/gitlab!51756

Adds delete functionality to metric images

See merge request gitlab-org/gitlab!50043

- Add changelog file

Documentation for Shopify tokens/secrets support

See merge request gitlab-org/gitlab!51720

Add documentation for SAST_EXCLUDED_ANALYZERS

See merge request gitlab-org/gitlab!50995

Revisions that fix tone, style, spelling, verb tense. Reformats a
warning box according to GitLab corporate style, and adds a link
to the deprecation MR.

Use GlBadge for badges in pipeline_url.vue

See merge request gitlab-org/gitlab!51058

Doc changes for optional code owners sections

See merge request gitlab-org/gitlab!51640

Add button location to the email button doc

See merge request gitlab-org/gitlab!51754

Add more vale rules to the usage list

See merge request gitlab-org/gitlab!51673

Add gl-button to Add Jaeger URL

See merge request gitlab-org/gitlab!51553

Track usage ping event when the full code quality report component is mounted

See merge request gitlab-org/gitlab!49079

Update to new GitLab UI in members invite page

See merge request gitlab-org/gitlab!51300