Merge branch 'tf-arcface' into 'master'

bob/bio/face/config/baseline/helpers.py

.../face/config/baseline/mobilenetv2_msceleb_arcface_2021.py

...bio/face/config/baseline/resnet50_msceleb_arcface_2021.py

bob/bio/face/embeddings/mobilenet_v2.py

bob/bio/face/embeddings/resnet50.py

bob/bio/face/embeddings/tf2_inception_resnet.py

bob/bio/face/tensorflow/preprocessing.py

cnn_training/arcface.py

setup.py