Fix that the Osmocom_OBS_nightly job is failing for the pyhss package with a dependency loop in hatchling:
LookupError: https://files.pythonhosted.org/…/hatchling-1.29.0.tar.gz (from https://pypi.org/simple/hatchling/) (requires-python:>=3.10) is already being built: hatchling>=1.21.0 from https://files.pythonhosted.org/…/hatchling-1.29.0.tar.gz
This happens as it recursively collects source packages and their (build) dependencies:
When only ignoring the hatchling source package, we get a similar dependency loop with pluggy, so ignore both source packages. Hatchling gets added later as binary package and pluggy is only a build-time dependency for hatchling. The resulting PyHSS package builds fine with this change.