AO3-6549 Remove ignore of auto collection invite column

[brianjaustin]

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Issue

https://otwarchive.atlassian.net/browse/AO3-6549

Purpose

Remove the ignore for the column that was deleted in #4505

Testing Instructions

Reference Jira

References

Are there other relevant issues/pull requests/mailing list discussions?

Credit

Brian Austin (they/he)

[brianjaustin]

Since the change was so small, I also went through the RuboCop issues for that file (and added tests). They should be addressed eventually either way, but if we prefer not to do all this at once I can revert some or all of them

[ceithir]

I fear you've opened Pandora's box: Now you have to update a regexp to a new syntax, and so must add a bunch more tests to make quite sure nothing was broken in the process.

What's currently in the PR seems good though. 👍

[brianjaustin]

@ceithir thanks for the review! Based on https://stackoverflow.com/a/3632051, I think it won't actually be too bad (just the extra test which would fail with the old regex)