Switch build backend to hatchling

[hoechenberger]

For whatever obscure reason, our builds here are working even though we're not installing all required build deps (still using setuptools instead of hatchling)

The host requirements should be updated to include

    - hatchling
    - hatch-vcs

@larsoner would you like to give it a shot if you have time?

[larsoner]

I can look tomorrow. No idea why it works currently!

[larsoner]

Not tomorrow, Tuesday

[hoechenberger]

@conda-forge/python Hello! We'd just like to bring your attention to the fact that this package's build backend was changed to hatchling (with hatch-vcs) upstream, and we forgot to update the feedstock – it would install pip, setuptools, setuptools-scm, and git; i.e., the new build deps were missing. However, builds still succeeded! We were wondering if this points to a problem with build isolation on conda-forge?

[xhochy]

You ran into conda/conda-build#3993