Use the EnforcedStyleForMultiline: no_comma option.
Signed-off-by: NRémy Coutable <remy@rymai.me>

Fixes https://sentry.gitlap.com/gitlab/gitlabcom/issues/27545/

These changes are ported over from
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1502 to reduce
the number of merge conflicts that may occur.

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.

This reverts commit e00fb2bdc2090e9cabeb1eb35a2672a882cc96e9.

# Conflicts:
#	.rubocop.yml
#	.rubocop_todo.yml
#	lib/gitlab/ci/config/entry/global.rb
#	lib/gitlab/ci/config/entry/jobs.rb
#	spec/lib/gitlab/ci/config/entry/factory_spec.rb
#	spec/lib/gitlab/ci/config/entry/global_spec.rb
#	spec/lib/gitlab/ci/config/entry/job_spec.rb
#	spec/lib/gitlab/ci/status/build/factory_spec.rb
#	spec/lib/gitlab/incoming_email_spec.rb

This reverts commit cb10b725c8929b8b4460f89c9d96c773af39ba6b.

C: Style/MultilineOperationIndentation:
Align the operands of an expression in an assignment
spanning multiple lines.

Feedback:

* https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9219#note_23343951
* https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9219#note_23344036
* https://gitlab.com/gitlab-org/gitlab-ce/issues/27762#note_23344797

TODO: Add tests and screenshots

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8664/diffs#note_22190504

The conflict happens when we try to update a build,
but fail to do so due to fact that we update the same build concurrently for two different runners.