Forbid Workflow Workdir from being on /tmp or /var/tmp

[rstyd]

We need to prevent users from accidentally submitting a job with the workdir being on /tmp or /var/tmp. Both of these directories are local to the front end where the job is being submitted, so there's no way for them to be accessed on the compute node.

[kabir-vats]

Does this mean any directory with those names or specifically coming from a home directory?

[pagrubel]

Does this mean any directory with those names or specifically coming from a home directory?

Those directories are in memory not physically on disk