Error messages: Help end-users navigate back if a form is no longer available

[srtalbot]

Scenario 1: a user navigates there from a link on the program page

As a person filing out a form
I need to navigate back to where I came from
When a form is no longer available
So that I can get in contact with the program team

Scenario 2: a user is directly linked to the page.

As a person filing out a form
I need to know that a form is no longer available
So that I know what to do next

For scenario 2, see card #686

[connorscarolyns]

Potentially, this could be fixed with a custom message included when forms are closed. PAs can add details like contacts or links to help users know what to do next.