AO3-6526 Don't reveal if user is banned or suspended when inviting as co-creator

[JonathanS223]

Pull Request Checklist

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• Have you read the contributing guidelines?
• Have you added tests for any changed functionality?
• Have you added the Jira issue number
  as the first thing in your pull request title (e.g. AO3-1234 Fix thing)
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Issue

https://otwarchive.atlassian.net/browse/AO3-6526

Purpose

This PR does the following:

1. Invalid creator: testy_banned is currently banned and cannot be listed as a co-creator to Invalid creator: testy_banned cannot be listed as a co-creator.
2. updated the function def check_disallowed so that it also checks to see if the user is banned or suspended while they have co-creator on. This way if they are banned, it will just simply tell them that they cannot be invited as a co-creator.

Testing Instructions

Ban or suspend a user
Log in as admin
Manage Users > Find Users
In “Name,” enter the name of the user you want to ban or suspend
Find
Follow the “Details” link
Under “Warnings and suspensions,” choose the desired option to ban or suspend
Fill in “Notes”
Update
Log out

Post a co-created work as the user who is not banned/suspended
Log in
Post > New Work
Fill in required info
Check “Add co-creators?”
Enter the name of the banned/suspended user
Post

References

There are no other known discussions or references that I have been able to find.

Credit

What name and pronouns should we use to credit you in the Archive of Our Own's Release Notes? Ivedonestranger (he/him)

Jira Account: Jonathan S. (ivedonestranger)

[JonathanS223]

Heck yeah. All checks passed. Should be good for review.

[sarken]

Just two really minor comments -- otherwise, it looks good! Thanks for working on this.

[JonathanS223]

Got slapped with covid and recovering. I'm still working on these changes and will work to get them updated.

[tickinginstant]

Sorry to hear you got COVID! I hope the recovery process has been smooth. Just one last change, and maybe revert the app/models/work.rb change to resolve the merge conflict, and then everything should be good to go.

[sarken]

Thank you!