Django admin: Prevent modifying domains in "deleted" status

[Katherine-Osos]

Issue description

When a domain is removed from the registry, its status is "deleted." To ensure it's information is preserved for historical reference, we do not want analysts to make modifications to these deleted domains.

Acceptance criteria

When a domain is in "deleted" status

• [ ] Prevent analysts from editing all fields on the Domain Application page
• [ ] Prevent analysts from editing all fields on the Domain Information page
• [ ] Prevent analysts from editing all fields on the Domains page

Additional context

Do we want to keep the "Notes" field editable on those pages?

Do we want to lock down any of the information on those pages for superusers, as well?

Links to other issues

No response

[PaulKuykendall]

At the appropriate time, this Just needs points, then can go into Ready.