Moved mc_ch configs to data

pyproject.toml

src/ptbench/configs/datasets/mc_ch/__init__.py

src/ptbench/configs/datasets/mc_ch/fold_0.py

src/ptbench/configs/datasets/mc_ch/fold_0_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_1.py

src/ptbench/configs/datasets/mc_ch/fold_1_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_2.py

src/ptbench/configs/datasets/mc_ch/fold_2_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_3.py

src/ptbench/configs/datasets/mc_ch/fold_3_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_4.py

src/ptbench/configs/datasets/mc_ch/fold_4_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_5.py

src/ptbench/configs/datasets/mc_ch/fold_5_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_6.py

src/ptbench/configs/datasets/mc_ch/fold_6_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_7.py

src/ptbench/configs/datasets/mc_ch/fold_7_rgb.py

src/ptbench/configs/datasets/mc_ch/fold_8.py

src/ptbench/configs/datasets/mc_ch/fold_8_rgb.py