Revert "run-test: Convert from bash to python." am: d08df34417

Original change: https://android-review.googlesource.com/c/platform/art/+/2241654

Change-Id: I91b801e3225e061ae069f222535aa0ec3c630841
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>