Remove existing EXPDIRs and COMROTs when CI is re-run

[TerrenceMcGuinness-NOAA]

Description

Quick hotfix for having default for re-runing jobs to start clean with new EXPDIRs and COMROTs

Type of change

• Bug fix (seems like overwrite experiment create may be broken again)

Change characteristics

• Is this a breaking change (a change in existing functionality)? NO
• Does this change require a documentation update? NO