feat(24.04): add python3-pip slices

[rebornplusplus]

This PR adds the python3-pip slices and it's dependencies.

[github-actions]

Diff of dependencies:
None found.

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[cjdcordeiro]

(discussed offline - it would be nice to have python version-specific slices)

[linostar]

LGTM

[rebornplusplus]

@cjdcordeiro please take another look when you are free. :)

[clay-lake]

As per chisel-releases PR extravaganza: We are going to create a python3 SDF which links to python3.12 in the case of 24.04, then include python3_minimal to the pip3_bins slice so it works out of the box.

[linostar]

Once #387 is merged, use python3_standard as a dependency instead of python3.12-standard.
Also remove bins slice from python3-pip and rename bins3-12 slice to become bins.

[norrisjeremy]

When will this slice be merged?

[linostar]

This is no longer blocked since #387 got merged.

[rebornplusplus]

Thanks for the nudge @norrisjeremy. The PR is updated.

[clay-lake]

Looks good to me. Thank you for your patience! @norrisjeremy
@cjdcordeiro

[cjdcordeiro]

LGTM thanks

[norrisjeremy]

Will this also be forward-ported into 24.10?

[cjdcordeiro]

Yes, @rebornplusplus will be raising that soon

[norrisjeremy]

Is there a reason why there isn't a python3-venv slice?

[rebornplusplus]

Is there a reason why there isn't a python3-venv slice?

I reckon it wasn't needed so far by anyone. Please feel free to raise a PR.

[rebornplusplus]

Will this also be forward-ported into 24.10?

Raised #428.