This adds virtual scrolling to the diffs app so that we can render
a lot of diff files in a very fast and performant way.
Doing virtual scrolling also helps us manage our memory usage a lot
as we aren't rendering a lot of components into the DOM.

Locally we get a lot of performance gains (close to 20s improvement
to the TBT time).

For now this is behind a feature flag. The feature flag is there so that this
can be merged but not enabled until we are sure this is something we
want.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/326773

Removed link references to here

See merge request gitlab-org/gitlab!60858

API caching for the Releases endpoint [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!60194

Resolve "Issue due date changes without user input"

See merge request gitlab-org/gitlab!60917

Fixes XSS in shared runner description

See merge request gitlab-org/gitlab!60891

It's "GitLab.com for Jira Cloud" now

See merge request gitlab-org/gitlab!59863

docs: Clarify when push mirrored repo gets the first update

See merge request gitlab-org/gitlab!60140

Properly parse time in alert payload

See merge request gitlab-org/gitlab!60806

Refactor notification recipients builder for watchers

See merge request gitlab-org/gitlab!60572

Update On-call test suite

See merge request gitlab-org/gitlab!58436

Use graphql boards for project issue boards sidebar specs (EE)

See merge request gitlab-org/gitlab!59938

Resolves rubocop offense Style/RaiseArgs [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!58009

Update lock timeout in ElasticCommitIndexerWorker to 1 day

See merge request gitlab-org/gitlab!60768

Clean up CSS for status-box in issuables

See merge request gitlab-org/gitlab!60783

Improve template of conflicts app

See merge request gitlab-org/gitlab!59400

Consistently handle recovery alerts

See merge request gitlab-org/gitlab!57302

Migration to move merge requests to separate Elasticsearch index

See merge request gitlab-org/gitlab!60586

Add e2e tests for empty state of License Compliance and Dependency List

See merge request gitlab-org/gitlab!59415

Improve frequent_items style flexibility

See merge request gitlab-org/gitlab!60855

Update Gitaly version

See merge request gitlab-org/gitlab!60920

- Use let_it_be over let for performance
- Remove repeated, unnecessary code

- Remove the stub for `graphql_board_lists` from sidebar_spec.rb (EE).

This adds spec coverage for project issue boards when it is using
graphql-based boards code. A few selectors are added for testing
in sidebar components.

- Create a temporary spec for the classic boards

We will simply clone `sidebar_spec.rb` as `sidebar_deprecated_spec.rb`
and continue to provide the spec coverage for project issue boards (EE)
when it is using the classic boards code.

This commit introduces a caching on the Release LIST v4 API
in order to avoid repeated computation on the payload rendering.

Fixed Vale future tense issues

See merge request gitlab-org/gitlab!60850

Fix API elasticsearch settings update

See merge request gitlab-org/gitlab!60740

Move scanner warnings in Vulnerability Report

See merge request gitlab-org/gitlab!60716

Remove Redundant Description HTML field from Release API [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!60380

DevOps Report: Convert Score page to Vue components

See merge request gitlab-org/gitlab!59856

Changelog: changed

Add more detailed tracking for the new_dropdown

See merge request gitlab-org/gitlab!60553