gh-101137: Add text/x-rst to mimetypes

[sobolevn]

• Issue: Add .rst to mimetypes #101137

[sobolevn]

Ok, I found #17995
Removing the md part from this PR.

[jaraco]

Thanks for getting this done before I committed and proposed the same change :)

[sobolevn]

Do we want a backport?

[jaraco]

Do we want a backport?

I'm unsure. For #17995, I contend that it definitely deserves a backport, since text/markdown is unequivocally in the standards list (so it's a bug that it's missing from the behavior). text/x-rst, however, is less formally recognized, so is less obviously a bug, so I'm slightly inclined not to back port it and treat it like a feature. On the other hand, text/x-rst is also standardized in the Python packaging ecosystem, so also seems like an obvious shortcoming. I'll flag this one for backport too, but without prejudice (and give the release manager some time to review after text/markdown).

[miss-islington-app]

Thanks @sobolevn for the PR, and @jaraco for merging it 🌮🎉.. I'm working now to backport this PR to: 3.12.
🐍🍒⛏🤖

[miss-islington-app]

Sorry, @sobolevn and @jaraco, I could not cleanly backport this to 3.12 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 1511bc95c4bc95bd35599dc9c88111c9aac44c0d 3.12

[jaraco]

@sobolevn Would you reconcile the backport? Thanks.

[bedevere-app]

GH-118599 is a backport of this pull request to the 3.12 branch.