bug#68317: Can't sort *Packages* buffer by version after installing with package-vc

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Cc: Joseph Turner <joseph@breatheoutbreathe.in>,  68317@debbugs.gnu.org
> Date: Tue, 09 Jan 2024 19:25:44 +0000
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> version-to-list: Invalid version syntax: 
> >> ‘c99367ebc2f0afe0baaf2f5e5ca1ad9d62ba6e21’ (must start with a number)
> >
> > Sounds like package-vc-commit should be modified to produce a valid
> > version string (which SHA1 is not)?  Philip?
> 
> We can also adjust `package-menu--version-predicate' to handle
> non-version numbers, which I think would be more robust.

Fine by me, but can this be done safely enough for emacs-29?