gh-101100: Fix Sphinx warnings from removed ~! references

[hugovk]

Fix 23 warnings for things like :meth:`~!unittest.TestProgram.usageExit` - the tilde says to render it like usageExit and the exclamation mark says not to look up the reference.

But after deprecations have been removed, Sphinx nevertheless issues a warning. So instead let's switch to :meth:`!usageExit` to show the short version and not look it up. This silences the warning.

Doc/whatsnew/3.11.rst:1863: WARNING: py:meth reference target not found: !unittest.TestProgram.usageExit Doc/whatsnew/3.3.rst:1055: WARNING: py:func reference target not found: !crypt.mksalt Doc/whatsnew/3.4.rst:1531: WARNING: py:meth reference target not found: !sunau.getparams Doc/whatsnew/3.4.rst:1543: WARNING: py:meth reference target not found: !sunau.AU_write.writeframes Doc/whatsnew/3.4.rst:1543: WARNING: py:meth reference target not found: !sunau.AU_write.writeframesraw Doc/whatsnew/3.4.rst:608: WARNING: py:meth reference target not found: !aifc.aifc.getparams Doc/whatsnew/3.4.rst:611: WARNING: py:meth reference target not found: !aifc.aifc.close Doc/whatsnew/3.4.rst:616: WARNING: py:meth reference target not found: !aifc.aifc.writeframes Doc/whatsnew/3.4.rst:616: WARNING: py:meth reference target not found: !aifc.aifc.writeframesraw Doc/whatsnew/3.4.rst:635: WARNING: py:func reference target not found: !audioop.byteswap Doc/whatsnew/3.5.rst:1255: WARNING: py:func reference target not found: !imghdr.what Doc/whatsnew/3.7.rst:2006: WARNING: py:meth reference target not found: !importlib.abc.MetaPathFinder.find_module Doc/whatsnew/3.7.rst:2006: WARNING: py:meth reference target not found: !importlib.abc.PathEntryFinder.find_loader Doc/whatsnew/3.7.rst:854: WARNING: py:func reference target not found: !crypt.mksalt Doc/whatsnew/3.9.rst:588: WARNING: py:class reference target not found: !nntplib.NNTP Doc/whatsnew/3.9.rst:588: WARNING: py:class reference target not found: !nntplib.NNTP_SSL build/NEWS:10243: WARNING: py:meth reference target not found: !unittest.TestProgram.usageExit build/NEWS:14046: WARNING: py:func reference target not found: !unittest.findTestCases build/NEWS:14047: WARNING: py:func reference target not found: !unittest.makeSuite build/NEWS:14048: WARNING: py:func reference target not found: !unittest.getTestCaseNames build/NEWS:20562: WARNING: py:class reference target not found: !nntplib.NNTP build/NEWS:20562: WARNING: py:class reference target not found: !nntplib.NNTP_SSL build/NEWS:20578: WARNING: py:class reference target not found: !nntplib.NNTP 

And for future removals, instead of doing:

-:meth:`~unittest.TestProgram.usageExit`+:meth:`~!unittest.TestProgram.usageExit`

Let's prefer:

-:meth:`~unittest.TestProgram.usageExit`+:meth:`!usageExit`

• Issue: Fix all Sphinx reference warnings in the documentation #101100

---

📚 Documentation preview 📚: https://cpython-previews--113629.org.readthedocs.build/

[AlexWaygood]

Looks good!

[miss-islington-app]

Thanks @hugovk for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12.
🐍🍒⛏🤖

[miss-islington-app]

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

cherry_picker 7595380347610598a3f5529214a449660892537b 3.12 

[miss-islington-app]

Sorry, @hugovk, I could not cleanly backport this to 3.11 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 7595380347610598a3f5529214a449660892537b 3.11 

[bedevere-app]

GH-113641 is a backport of this pull request to the 3.12 branch.

[bedevere-app]

GH-113642 is a backport of this pull request to the 3.11 branch.