MNT: Use noarch python {{ python_min }} variable

[matthewfeickert]

• Use 'python {{ python_min }}' syntax for the python requirements for noarch python recipes.
  • c.f. https://conda-forge.org/docs/maintainer/knowledge_base/#noarch-python
• Add recipe/conda_build_config.yaml to override the global python_min with cabinetry's python_min of 3.8.
• Add conda-forge/scikit-hep as feedstock maintainers.
• Build with '--no-deps --no-build-isolation' to verify build requirements are specified.
• Add setuptools build backend as host requirement.
• Use 'pypi.org'.
• Bump build number.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• [N/A] Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[matthewfeickert]

@conda-forge-admin, please rerender

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe/meta.yaml:

• ℹ️ No valid build backend found for Python recipe for package cabinetry using pip. Python recipes using pip need to explicitly specify a build backend in the host section. If your recipe has built with only pip in the host section in the past, you likely should add setuptools to the host section of your recipe.

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[matthewfeickert]

@conda-forge-admin, please rerender

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

_{This message was generated by GitHub actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/11787976158.}