Configure testing with Podman and Mamba

[TomKellyGenetics]

Implements unit testing and GitHub Actions with Podman. Migrates changes in PR #1706 for separate discussion.

Note that Mamba has also been proposed as an alternative to Conda in PR #2610.

PR checklist

• [x] This comment contains a description of changes (with reason).
• [ ] If you've fixed a bug or added code that should be tested, add tests!
• [ ] If you've added a new tool - have you followed the module conventions in the contribution docs
• [ ] If necessary, include test data in your PR.
• [x] Remove all TODO statements.
• [ ] Emit the versions.yml file.
• [ ] Follow the naming conventions.
• [ ] Follow the parameters requirements.
• [ ] Follow the input/output options guidelines.
• [ ] Add a resource label
• [ ] Use BioConda and BioContainers if possible to fulfil software requirements.
• Ensure that the test works with either Docker / Singularity. Conda CI tests can be quite flaky:
  • [ ] PROFILE=docker pytest --tag <MODULE> --symlink --keep-workflow-wd --git-aware
  • [ ] PROFILE=podman pytest --tag <MODULE> --symlink --keep-workflow-wd --git-aware
  • [ ] PROFILE=singularity pytest --tag <MODULE> --symlink --keep-workflow-wd --git-aware
  • [ ] PROFILE=conda pytest --tag <MODULE> --symlink --keep-workflow-wd --git-aware
  • [ ] PROFILE=mamba pytest --tag <MODULE> --symlink --keep-workflow-wd --git-aware

[jfy133]

I don't think the mamba support is necessary either, given: https://www.anaconda.com/blog/conda-is-fast-now

[muffato]

This branch will have to be rebased to include the changes made in #2740

[TomKellyGenetics]

Updates as requested. Thanks for taking this proposal into consideration.

[maxulysse]

Same as other, don't think it's necessary

[SPPearce]

So, do we want to implement Podman and Mamba or do we want to close this PR?