Moved mc_ch_in configs to data

pyproject.toml

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

src/ptbench/configs/datasets/mc_ch_in/default.py

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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