Update error message for temp users trying to use special pages
Why:
- In Ie0dd06f51b1e2b85eef6be377f673a02732ce604, the SpecialPage ::requiredNamed method was updated to redirect temporary accounts to Special:CreateAccount.
- This included adding a new message key used for the warning that is shown on Special:CreateAccount.
- This message is generated by adding '-for-temp-user' after the provided message key, and then using it as the message if that message key exists.
- A new message key needs to be added to compliment the existing 'contactpage-mustbeloggedin' message for use on the Special:CreateAccount page.
What:
- Add the 'contactpage-mustbeloggedin-for-temp-user' message key
Depends-On: Ie0dd06f51b1e2b85eef6be377f673a02732ce604
Bug: T358586
Change-Id: I5d7c99c2f9a7f316ca9c862264bebeb332a801a3