Enhance Linux tests in using the supported python version matrix outside Conda

[tramora]

Description

Currently, in the tests.yml workflow we run the tests against a matrix of conda envs with the supported python versions (from 3.10 to 3.14).

We should do the same for simple python virtual environments for the tests running on Linux

Questions/Ideas

In the khiopsydev-ubuntu dev image, we will try to install all the supported and alternative python versions (with uv or ppa etc...).
In the workflow the current step Run Unit & Integration Tests would be duplicated into Run Unit & Integration Tests in Conda and Run Unit & Integration Tests in venv

[popescu-v]

uv supports this: https://docs.astral.sh/uv/concepts/python-versions/#requesting-a-version. Hence, I'd go for replacing the Conda envs with uv venvs in tests.yaml. But only after khiops-core is released as a Pip package on PyPI. khiops-core is already on Test PyPI.

[popescu-v]

The only Conda tests should stay in the test-conda-forge-package.yml workflow IMHO. Hence, any relevant Conda environment should be created in that workflow IMHO.

Indeed, Conda was used in tests.yml as a practical way of having the full array of supported Python versions. However, the goal of this issue is to supersede Conda by uv for this purpose.