Add TRD 22c_mcbm par files as link to 21b_mcbm (geo file fix for radlen, #2417)

Follows hint and review by @a.bercuci in #2417

Associated MRs: cbmroot_geometry!139 (merged) and computing/cbmroot!706 (merged)

mentioned in merge request cbmroot_geometry!139 (merged)

Dear @a.bercuci, @p.kaehler,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

mentioned in merge request computing/cbmroot!706 (merged)

changed the description

merged