[qa] Changes to docformatter; Update minimum Python version to 3.9

src/ptbench/configs/models/alexnet.py

src/ptbench/configs/models/alexnet_pretrained.py

src/ptbench/configs/models/densenet.py

src/ptbench/configs/models/densenet_pretrained.py

src/ptbench/configs/models/logistic_regression.py

src/ptbench/configs/models/pasa.py

src/ptbench/configs/models/signs_to_tb.py

src/ptbench/configs/models_datasets/densenet_rs.py

src/ptbench/data/hivtb/__init__.py

src/ptbench/data/hivtb/fold_0.py

src/ptbench/data/hivtb/fold_1.py

src/ptbench/data/hivtb/fold_2.py

src/ptbench/data/hivtb/fold_3.py

src/ptbench/data/hivtb/fold_4.py

src/ptbench/data/hivtb/fold_5.py

src/ptbench/data/hivtb/fold_6.py

src/ptbench/data/hivtb/fold_7.py

src/ptbench/data/hivtb/fold_8.py

src/ptbench/data/hivtb/fold_9.py

src/ptbench/data/image_utils.py