gh-109408: Revert pre-commit whitespace checks pending portable solution

[hugovk]

Re: #110652, revert PRs #109890 and #109891 because we didn't find a portable solution that works on both macOS and Windows.

I kept a couple of the string formatting (and whitespace) improvements:

-    return "{} file{}".format(count, "s" if count != 1 else "")
+    s = "s" if count != 1 else ""
+    return f"{count} file{s}"

-    cmd = "git remote show {}".format(remote_name).split()
+    cmd = f"git remote show {remote_name}".split()

(I suggest finding existing pre-commit checks that can do more-or-less the same thing as the patchcheck things. They don't necessarily need to be exactly the same.)

• Issue: Move Azure Pipelines CI to GitHub Actions #109408

[hugovk]

Note: I kept the changes to untabify.py because they look good.

[AlexWaygood]

LGTM. N.B. #109890 made some changes to Tools/patchcheck/untabify.py that haven't been reverted here, but I think they're good changes that we should keep, anyway :)

[miss-islington]

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

[bedevere-app]

GH-110730 is a backport of this pull request to the 3.12 branch.

[AlexWaygood]

@erlend-aasland FYI!

[erlend-aasland]

Thanks!