fix: allow bwa_mem2 and mbcs in cbioportal_export model

[tedil]

Fixes #600

[coveralls]

coverage: 85.811% (+0.003%) from 85.808%
when pulling efc4bc3 on update-cbioportal-export-model
into f49fafb on main.

[ericblanc20]

Thanks! One thing though:
STAR should not be added to the mapping tools, because cbioportal handles expression data very differently than genetic data.

[tedil]

Thanks! One thing though: STAR should not be added to the mapping tools, because cbioportal handles expression data very differently than genetic data.

Thank you, fixed that!