[tests] Implement tests for some remix datasets

tests/test_mc_ch.py

tests/test_mc_ch_in.py

tests/test_mc_ch_in_11k.py

tests/test_mc_ch_in_11kv2.py

tests/test_montgomery_shenzhen.py

tests/test_montgomery_shenzhen_indian.py

tests/test_montgomery_shenzhen_indian_tbx11k.py