Use `uv` to create a Python venv environment.

[yankay]

What would you like to be added

Use uv for a Python venv environment. Update the documentation and CI scripts, such as:

• https://github.com/kubernetes-sigs/kubespray/blob/master/docs/ansible/ansible.md#installing-ansible
• https://github.com/kubernetes-sigs/kubespray/blob/master/CONTRIBUTING.md
• https://github.com/kubernetes-sigs/kubespray/blob/master/Dockerfile

Why is this needed

Since uv helps better pin Python and pip versions, and has better performance. ref:
https://docs.ansible.com/ansible/latest/reference_appendices/release_and_maintenance.html#ansible-core-support-matrix

[VannTen]

I don't think we necessary need to use uv ; however, I was not aware of the new lockfile PEP 751 with a now standardized lockfile.

I think we might instead want to go the standard route and use a tool which produces that new pylock.toml