Move armarx_face_recognition to own package

Move armarx_face_recognition to https://git.h2t.iar.kit.edu/sw/armarx-integration/face-recognition/python-face-recognition-armarx

Implementation of https://git.h2t.iar.kit.edu/orga/software-organization/-/issues/306

See https://git.h2t.iar.kit.edu/sw/armarx-integration/face-recognition/python-face-recognition-armarx/-/merge_requests/1 for related MRs