Update test guidelines for externalized contents

See merge request gitlab-org/gitlab!69312

Introduce versioned GitLab migration class

See merge request gitlab-org/gitlab!68986

Add support for description lists in content editor

See merge request gitlab-org/gitlab!69149

Fix check and cross symbols on containers page

See merge request gitlab-org/gitlab!69342

Issue template for infradev

See merge request gitlab-org/gitlab!69362

This introduces a versioned parent class for database migrations.

This implements a simple versioning scheme for migration helpers.

We need to be able to version helpers, so we can change their behavior
without altering the behavior of already existing migrations in
incompatible ways.

We can continue to change the behavior of helpers without bumping the
version here, *if* the change is backwards-compatible.

If not, we would typically override the helper method in a new
MigrationHelpers::V[0-9]+ class and create a new entry with a bumped
version below.

We use major version bumps to indicate significant changes and minor
version bumps to indicate backwards-compatible or otherwise minor
changes (e.g. a Rails version bump). However, this hasn't been
strictly formalized yet.

Changelog: other

Fix broken test

See merge request gitlab-org/gitlab!69364

Clarify UI CI variables are'nt available to services

See merge request gitlab-org/gitlab!67787

Use jh/Gemfile if it exists

See merge request gitlab-org/gitlab!69361

Use linear version User#groups_with_developer_maintainer_project_access

See merge request gitlab-org/gitlab!68851

Zoom into design image upto 100% of actual size

See merge request gitlab-org/gitlab!68755

Clean up Secure service ping metric definitions

See merge request gitlab-org/gitlab!69257

Simplify issues counts query in issues page refactor

See merge request gitlab-org/gitlab!69310

Cache group issues count for state

See merge request gitlab-org/gitlab!67418

[ci skip]

- Add specs

Add condition to truncate counts text

- Add tests for method issuables_state_counter_text

Revert to using RequestStore if cache is empty

Limit caching to group isssues

- Rename FF
- Move FF check to group model
- Update specs

Use existing format_cached_count method

Refactor #params_include_filters?

Replace "the the" with "the"

See merge request gitlab-org/gitlab!69134

The 2 tests can be merged for simplicity,
as the second test is testing the
internal implementation.

Add rollout issue for track_epic_boards_activity

See merge request gitlab-org/gitlab!69348

Update Actionable Insight template to make issue confidential by default

See merge request gitlab-org/gitlab!69157

Fix product tier on Jira importer doc

See merge request gitlab-org/gitlab!69347

Consume security policy yaml in specs from factory

See merge request gitlab-org/gitlab!69109

This commit moves the hardcoded policy yaml content
in specs into a new factory.

This commit is a follow-up from
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/69108.

Prevent overriding DOMPurify's default config with custom configuration

See merge request gitlab-org/gitlab!69269

Refactor Vue issues list variable names

See merge request gitlab-org/gitlab!69300