Mirgrate from pip to uv

[ericwb]

In order to improve build time performance, this change switches usage of pip to uv. The uv command is a pip alternative promising much faster installs of Python packages.

For more information on uv, see:
https://github.com/astral-sh/uv

Closes #2748

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[Lendemor]

I've compared the execution time to other PRs that don't use uv yet, but I don't find any significant improvement on the runtime of jobs.

However, I think we can still go ahead with this PR anyway.

[ericwb]

I've compared the execution time to other PRs that don't use uv yet, but I don't find any significant improvement on the runtime of jobs.

However, I think we can still go ahead with this PR anyway.

Yeah, I didn't see much of a performance boost. I suspect its probably because poetry is installing most of the dependencies.