Set mt files as non mandatory

[jemten]

For exome samples there won't be any calls on the mitochondria with the current setup. Thus no ranked vcfs will be generated for and these files should be set as on-mandatory.

hermes/cg_hermes/config/raredisease.py

Line 254 in 01be334

frozenset(["rank_and_filter", "mt_clinical"]): {

The raw calls are already non-mandatory