Use uuid4 instead of PID in cache temp name to prevent collisions.
Use uuid4 instead of PID in cache temp name to prevent collisions.

As title.

Fixes #7952

cpcloud/numba,numba/numba,numba/numba,cpcloud/numba,cpcloud/numba,numba/numba,cpcloud/numba,cpcloud/numba,numba/numba,numba/numba