Fixes #36610 - Add system purpose to activation key details

[jeremylenz]

What are the changes introduced in this pull request?

Adds the System Purpose card to the new activation key details page, as per the mockup. This means the System Purpose card now works on both this page and the new host details page.

Also added the page section which adds the grey background.

Considerations taken when implementing this change?

The mockup has a slightly different layout on the AK details page vs. the host details page. On AK details, it's a 2-column layout, while it's 1 column on host details. The same component handles both situations, using a few ternaries and such.

Patternfly has some super-weird CSS that misaligns the card expansion carat. I had to fix it.

What are the testing steps for this pull request?

Turn on the 'Show Experimental Labs' setting and go look at your activation keys.

Make sure viewing and editing of System Purpose attributes works as expected on both pages.

[theforeman-bot]

Issues: #36610

[lfu]

Tests worked well.

[jeremylenz]

I realized that available release versions are not getting properly retrieved. will update soon

[jeremylenz]

@lfu Addressed comments and fixed release versions, also added tests for it.

[lfu]

Seems this API call always returns the same result no mattter the host's release version:
/api/v2/hosts/<ID>/subscriptions/available_release_versions
which may be out of the scope of this PR.

Other than that, it worked well.

[jeremylenz]

Seems this API call always returns the same result no mattter the host's release version:

# host_subscriptions_controller.rb:

def available_release_versions
      releases = @host.content_facet.try(:available_releases) || []

# content_facet.rb:

def available_releases
        self.content_view_environments.flat_map do |cve|
          cve.content_view.version(cve.lifecycle_environment).available_releases
        end
      end

# content_view_version.rb

  def available_releases
      Katello::RootRepository.where(:id => self.repositories.select(:root_id)).pluck(:minor).compact.uniq.sort
    end

I think because it's based on what RootRepositories you have, this is expected.

[jeremylenz]

[test katello]

[lfu]

APJ

[jeremylenz]

Thanks @lfu and @trev-allison03! Merged