Add notification so Analysts know when they cannot change request status from "Approved"

[gabydisarli]

Issue description

In DjA we know there are certain statuses that analysts can change a request to depending on what status the request is currently in. If a request gets moved to approved, a domain information object gets created. If an analyst moves this request from approved > to in review, etc. then we will now delete the domain information object that was created so that there's no errors if the analyst then tries to move it back to approved. If however, a request gets moved to approved, and then a domain manager adds name servers, it (the associated domain) is now in Ready state. Once in Ready status, an analyst will not be allowed to change that request back to anything other than approved. Let's add a notification telling analysts that the request cannot have its status changed because the associated domain is in Ready.

Acceptance criteria

• [ ] new notification appears at the top of a domain request (domain application) page in DjA when a domain application is joined to a domain in Ready status. This should look and behave similar to how we show analysts when contacts are joined to objects.
• [ ] new notification copy: The status of this domain request cannot be changed because it has been joined to a domain in Ready status: <domain name>
  • [ ] NOTE: domain name is a clickable link taking analyst to the associated domain

Additional context

This work came from a suggestion Rachid made in https://github.com/cisagov/manage.get.gov/pull/1718

Slack discussion

Links to other issues

Relates to: #1674

[gabydisarli]

@rachidatecs FYI 👍

[abroddrick]

I think this epic should be for analyst efficiency @PaulKuykendall & @vickyszuchin

[vickyszuchin]

I'm going to mark it as "Future: Analyst experience" for now while it is in "New". Product can decide if they want it in "Analyst efficiency" when the ticket is triage. I will move it up on the "New" queue so that it can be looked at earlier. cc: @abroddrick