add mcbm tof_v21i digi

links to tof_v21g digi

Dear @v.singhal, @n.herrmann, @i.deppner,

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

merged

I take it upon myself to merged it as it is identical to 21h (geometries only needed to be fixed due to material bug)