hey team. i'm working on changing clean-all to move .pants.d to a temp folder and delete in a subprocess, but python subprocesses only take command line arguments. the current implementation uses safe_rmtree from dirutil. should i (1) subprocess "rm -rf" of the temp dir or should i (2) create another python file (clean-runbg.py) whose main calls safe_rmtree and subprocess "python clean-runbg.py”?