Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/27070

Deprecate "chat commands" in favor of "slash commands"

We looked for things like:

 - `slash commmand`
 - `slash_command`
 - `slash-command`
 - `SlashCommand`

Previously it was possible when an issue was updated and Akismet flagged it as spam
that the reCAPTCHA configuration was not loaded.

Closes #33532

They can admin group labels anyway, we weren't checking the more specific
permission.

in the tests

+ add missing prometheus_controller tests!

Various Rails initializers (metrics, sentry, etc) are run before migrations,
which can lead to a mismatch between app/models/application_settings.rb and
schema.

Also add minor changed needed to pass review

Added the needed keys and paths to a new entity, BuildDetailsEntity.
Not renaming BuildEntity to BuildBasicEntity on explicit request. Most
code now has test coverage, but not all. This will be added on later
commits on this branch.

Resolves gitlab-org/gitlab-ce#31397