Review documentation for setting up and running T compsets with your own forcing data

With the transition to CMEPS & CDEPS, I think some of the details in this section of the documentation will need to be reworked a bit:

https://escomp.github.io/cism-docs/cism-in-cesm/versions/master/html/t-compsets.html#creating-and-running-with-your-own-forcing-data