Tricky to not rerun dt maps

[tdixon97]

Currently it is not easy to tell snakemake to not rerun drift time maps (unlike for example stp or hit). I think this would be a useful feature

[gipert]

I think we want to move all hit pars to a dedicated .skm.

[tdixon97]

I think this can be considered closed now, since we have so many fewer dt maps?

[gipert]

I still want to move things to a dedicated snakefile, cleaner