graphics/py-face_recognition_models: add missing runtime dependency

The package imports pkg_resources at runtime, which is provided by
devel/py-setuptools. Add setuptools as a RUN_DEPENDS to avoid
ModuleNotFoundError when using face_recognition_models without setuptools
installed.

PR: 288531
Reported by: kaltheat@gmail.com

(cherry picked from commit f18a04ffb9c1d698ce9264ecf9bcf01fa6724fec)