Bug#1051981: R:e systemd-boot kernel postinst script calls ukify which requires python3

[Alexandre Detiste]

>A possible middle way could be to implement
>/usr/lib/kernel/install.d/60-ukify.install in shell, the script seems
> the script seems simple enough.

The little script load & call a much bigger one:
      https://github.com/systemd/systemd/blob/main/src/ukify/ukify.py

>def call_ukify(opts):
>   # Punish me harder.
>   # We want this:
>   # ukify = importlib.machinery.SourceFileLoader('ukify', UKIFY).load_module()
>   # but it throws a DeprecationWarning.
>   ...
>   ukify = runpy.run_path(UKIFY, run_name='ukify')

Greetings