Python 3: Fix the way that the project ID is discovered in the Python tests to ensure it is a string not a byte array.
Python 3: Fix the way that the project ID is discovered in the Python tests to ensure it is a string not a byte array.

This allows for enabling Python 3 in all of our automated tests.

PiperOrigin-RevId: 243646787

DataBiosphere/dsub,DataBiosphere/dsub