Files still need to be marked as License-File to be considered %license,
but if their path in METADATA is specified relative to dist-info/licenses,
they are correctly recognised.
This makes License-Files specified by hatchling 1.9.0+ marked as %license.
Related: rhbz#2168193
The hook is optional, see https://www.python.org/dev/peps/pep-0517/#prepare-metadata-for-build-wheel
> If a build frontend needs this information and the method is not defined,
> it should call build_wheel and look at the resulting metadata directly.
This is not yet automatically detected because the feature is provisional.
Use `%pyproject_buildrequires -w` to opt-in.
Resolves: rhbz#2060109
