[dev] Make test-dataproc target robust to __pycache__ (#6622)
[dev] Make test-dataproc target robust to __pycache__ (#6622)


danking/hail,danking/hail,hail-is/hail,hail-is/hail,danking/hail,hail-is/hail,cseed/hail,hail-is/hail,hail-is/hail,danking/hail,cseed/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,hail-is/hail,cseed/hail,hail-is/hail,hail-is/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,cseed/hail