`termios.error` should be an alias or subclass of `OSError`

[manueljacob]

Bug report

Bug description:

termios.error probably should have been made an alias of OSError by PEP 3151, but it seems like it was forgotten.

The following assertion should not fail, but fails currently:

import termios
assert issubclass(termios.error, OSError)

CPython versions tested on:

3.9, 3.10, 3.11, 3.12, 3.13

Operating systems tested on:

Linux

[JelleZijlstra]

Perhaps it should have covered termios.error, but PEP-3151 was implemented more than a decade ago and any change we make now will have to be justified on its own merits. cc @pitrou and @warsaw as the author and delegate for the PEP.

If you want this change to be made, you'll have to provide a motivation for the change and an explanation of why the change is consistent with our backward compatibility policy.

[StanFromIreland]

Should this not have been marked as pending? Seeing as there has been no feedback for several months it seems there is no real need.