This makes it possible to maintain backwards compatibility with configs
created when manual actions were non-blocking.

From now manual actions are blocking if configured with `allow_failure:
false`, otherwise manual actions are optional, and their status is
ignored.

Do not skip manual actions even if actions are optional.

This will make it easier to extend this spec file to add new test
examples covering blocking manual actions.

Enable build job for caching Gems of GitLab EE

See merge request !9712

Remove es6 file extension from JavaScript files

See merge request !9241

Re-enable GitLab pages job for GitLab EE

See merge request !9703

Formats timeago dates to be more friendly

Closes #27537

See merge request !9145

Use CommonsChunkPlugin to place vendor libraries in cacheable bundles

Closes #25550

See merge request !9647