Clean POSYDON repository

[maxbriel]

This pull request:

• Removes three git submodules (see below).
• updates the setuptools we use.
• Moves from versioneer.py to setuptools-scm for easier intergration.
• Automatically updates the conda.yaml version.
• Moves project definitions and requirements into pyproject.toml instead of defining them inside setup.py.
• Cleans up test CI by adding project parameters to pyproject.toml.

I tried to also get some automated coverage report uploading working, but I do not have permission for this.

The removed submodules are:

1. The data submodule. This one wasn't used anymore.
2. The POSYDON-MESA-INLISTS inside grid_params/. This one is used in the paths of grid_params.ini to setup a grid and in posydon-run-pipeline, but always in reference to scripts that are stored in the POSYDON-MESA-INLIST repository.
3. Remove the old posydon/tests

This PR also moves the files inside grid_params/ into config_files/ + splits the MESA defaults from the

To-Do's:

• Links in tutorials
• Update the paths inside the default grid params config files
  • config_params/MESA_grids
  • cluster specific grid_params + cluster pipeline
• Move pipeline run scripts for each cluster from POSYDON-MESA-INLISTS to new config_files folder.
• Update posydon-run-pipeline to use new folder

[maxbriel]

I've closed this PR and opened #784 instead. The removal of the POSYDON-MESA-INLIST submodule is more complicated than I expected.