Revert^2 "Enable new python path behavior by default"

This reverts commit 4d5cc709.

Reason for revert: Acloud issue was fixed in aosp/2243150, make sure the host unit tests are run on this cl via go/abtd before submitting

Change-Id: Ie148430d331a01a9877adaf3cb88f1c57af136a0
Bug: 245583294
Bug: 247578564
Bug: 251688241