Add remove RUNDIRS step in CI before creating experements

[TerrenceMcGuinness-NOAA]

Description

As had been done in Bash CI we need to remove the RUNDIR in Jenkins before a creating an experiment in the event that case had beem previously ran.

Type of change

• Bug fix (fixes something broken)

Change characteristics

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

How has this been tested?

No