Make CargoPythonPackage the default class for extensions/components of CargoPythonBundle

[Flamefire]

(created using eb --new-pr)

[Micket]

lgtm

[Flamefire]

Note: This currently doesn't change anything because the only difference of CargoPythonPackage to PythonPackage doesn't matter (yet) for Extensions.
Maybe for the components but there currently would need to be a default easyblock anyway which I haven't seen.
Speaking of it: Should we really unconditionally overwrite the default easyblock in (Cargo)PythonBundle and ignore if it was set by the EC?

[Flamefire]

This needs a small fix so it works with e.g. pymatgen-2023.12.18-foss-2023a.eb and others

https://github.com/Flamefire/easybuild-easyblocks/blob/f9ab7b091557cd3046faba9992891c50240059e6/easybuild/easyblocks/generic/cargo.py#L240C1-L240C44

this updates sources which in that case is a dictionary and hence fails (updating dict with list errors out)

Proposed fix: Convert sources to a list if it isn't one already in the __init__ call of EasyConfig

[Flamefire]

This needs a small fix so it works with e.g. pymatgen-2023.12.18-foss-2023a.eb and others

https://github.com/Flamefire/easybuild-easyblocks/blob/f9ab7b091557cd3046faba9992891c50240059e6/easybuild/easyblocks/generic/cargo.py#L240C1-L240C44

this updates sources which in that case is a dictionary and hence fails (updating dict with list errors out)

Proposed fix: Convert sources to a list if it isn't one already in the __init__ call of EasyConfig

Actually the issue was attempting to add (in this case no) crates to sources for extensions which isn't supported. Fix added
84b798d

[Flamefire]

That check caused failures because the crates easyconfig parameter from the parent gets inherited by the extension so it is impossible to differentiate where it was coming from: The parent is ok, the extension-options is not.

I updated the easyblock to reset crates for extensions, see also easybuilders/easybuild-framework#5075

Rebased and removed the change to configure_step that is in #3996

[boegel]

merged via:

• Create lockfile for Cargo package if missing #3995