Resolve "MR Refactor: Improve performance by setting v-once"

Closes #48982

See merge request gitlab-org/gitlab-ce!20468

Merge branch '48897-mr-refactor-parallel-and-diff-view-are-being-rendered-at-the-same-time' into 'master'

Resolve "MR refactor: parallel and diff view are being rendered at the same time"

Closes #48897

See merge request gitlab-org/gitlab-ce!20440

Add basic export to fix timeout problem on import_file_spec.rb

See merge request gitlab-org/gitlab-ce!20469

Improve render performance of large wiki pages

See merge request gitlab-org/gitlab-ce!20465

[ci skip]

Compile often used regexps only once outside of the loop.

This commit improves the performance of large wiki pages with many, many references.

Merge branch '48661-node-6-and-7-compatibility-broken-by-recent-monaco-editor-upgrade' into 'master'

Resolve "Node 6 and 7 compatibility broken by recent Monaco editor upgrade"

Closes #48661

See merge request gitlab-org/gitlab-ce!20461

Add missing foreign key in import_export_uploads

See merge request gitlab-org/gitlab-ce!20458

Merge branch '48670-application-settings-may-not-be-invalidated-if-migrations-are-run' into 'master'

Resolve "Application settings may not be invalidated if migrations are run"

Closes #48670

See merge request gitlab-org/gitlab-ce!20389

Refactor rspec matchers in read_only_spec.rb

See merge request gitlab-org/gitlab-ce!20414

Redesign for mr widget info and pipelines section

Closes #46795

See merge request gitlab-org/gitlab-ce!20189

Resolve "GitLab Project export should use object storage"

Closes #46246

See merge request gitlab-org/gitlab-ce!20105

remove extra tick for eks docs

See merge request gitlab-org/gitlab-ce!20453

Use proper markdown rendering for previews

See merge request gitlab-org/gitlab-ce!19672

Add GPL Commitment language

See merge request gitlab-org/gitlab-ce!20449

Add ExclusiveLease guards for RepositoryCheck::{DispatchWorker,BatchWorker}

See merge request gitlab-org/gitlab-ce!20441

Make it clear that we need to enable omniauth for SAML and Bitbucket

See merge request gitlab-org/gitlab-ce!20421

CE: Move mailer preview to app directory

See merge request gitlab-org/gitlab-ce!20430

We saw in production that DispatchWorker was running about twice an hour,
which would schedule twice as many jobs as it should.

For some reason, BatchWorker was running 1000 times per hour, possibly
due to Sidekiq RSS kills that caused these jobs to restart.

Adding an ExclusiveLease prevents these jobs from running more
than they should.

Relates to https://gitlab.com/gitlab-com/infrastructure/issues/4526