[BUG]: Incorrect type hints for older versions

[gentlegiantJGC]

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What version (or hash if on master) of pybind11 are you using?

05a6a03

Problem description

A number of the type hints have been updated for never versions of Python but are now incorrect for older versions of Python.
An example is collections.abc.Buffer which was added in Python 3.12 however there are many more examples.

If an extension is compiled against an older version of Python the stub files generated will be incorrect for that version and a static type checker will correctly throw errors.

I would expect the type hints to be correct for the version of Python the extension was compiled against regardless of which version it is.

Reproducible example code

Is this a regression? Put the last known working version here if it is.

Not a regression

[gentlegiantJGC]

This was discussed in #5566 but I wanted to create a new issue so it doesn't get lost there.