EnsembleOfVariational.csh file cleanup needs adjusting

[jim-p-w]

The file removal needs to be more restrictive: https://github.com/NCAR/MPAS-Workflow/blob/41d50adb25f84e95bdb7e2b2202ec1c84a01d352/bin/EnsembleOfVariational.csh#L129C10-L129C35

Each instance of this job will remove all of the output files. The job must only remove the output files for the ensemble members the script is executing, e.g.
if there are 12 ensemble members and EDASize is 3, then there will be 4 jobs (nDAInstances=4)

job 1 will handle members 1-3, job 2 will handle members 4-6, etc.

Also, the check for $MicrophysicsOuter should be protected by
if ( $?MicrophysicsOuter ) then to ensure the variable is set before dereferencing it.

MPAS-Workflow/bin/EnsembleOfVariational.csh

Line 97 in 41d50ad

if (${MicrophysicsOuter} == 'mp_thompson' ) then