Re-ran Prettier on source files again, with some more ignores

[JoshuaKGoldberg]

PR checklist

• Addresses an existing issue: Prettier hasn't been run on all files yet #4229

Overview of change:

Continues on #4214 - I either merged incorrectly or missed some file exclusions that were needed.

Is there anything you'd like reviewers to focus on?

Two reasons why I'd like to merge this in very quickly:

• Other PRs are blocked on having many unrelated changes from Prettier
• This is a continuation of the already-approved Upgrade prettier and run over all files #4214.

Of special note is .prettierignore, which has several folders added for data files that shouldn't be formatted.

[johnwiseheart]

Very difficult to look at all the changes, but the couple that I looked at seem reasonable so LGTM

[JoshuaKGoldberg]

Very difficult to look at all the changes

Yeah, sorry about that 🙁. Thanks for the quick review!