if-defs: Debug switches

[JessicaMeixner-NOAA]

Is your feature request related to a problem? Please describe.
As a second step towards going from #ifdefs to run-time logicals, there will be a conversion of debug, trace and trouble-shooting switches to logicals. These switches include:
DEBUGSETUGIOBP, DEBUGSRC, DEBUGINIT, DEBUGIO, DEBUGRUN, DEBUGCOH, DEBUGIOBP, DEBUGDCXDX, DEBUGIOBC, W3_DEBUGIOGR, DEBUGSETIOBP, DEBUGFLS, DEBUG, MPIT, MPRF, S, T, T0, T1, T2, T3, T8, T38, TS

This will be part of a series of disruptive PRs that will not start until Oct 5, 2022. Please submit PRs if you'd like to reintegrate work before the disruptive changes.

Describe the solution you'd like
A PR to the develop branch with these code changes plus a script available for others to covert their own code if they're unable to reintegrate their work before this PR is merged to help with the merge process.

Describe alternatives you've considered
Converting source terms first. @mvertens and @DeniseWorthen think doing this first will make converting source terms easier.

Additional context
See the discussion on if-def.