use google-auth2.14.1 in tests

[vchudnov-g]

@daniel-sanche pointed out that the testing constraints with Python 3.9 now seems to require google-auth==2.35.0, and it would be great to be use a lower version number. I manually testing that simply requiring 2.14.1 there does NOT work.

It's curious that this constraint appears to come from google-api-core (essentially implemented even before 2024-10-28 ), even though before #2502, using google-auth==2.14.1 under Python 3.7 seems to have worked fine.

We should figure out whether/how to get the lower google-auth constraint to work for the generator tests. Maybe we need separate constraints file for sync and async, like google-api-core uses

[parthea]

We have a similar issue with the google-api-core dependency where there is a mismatch in setup.py and constraints

In setup.py we have "google-api-core[grpc] >= 2.11.0, <3.0.0",

gapic-generator-python/gapic/templates/setup.py.j2

Line 36 in bba0231

"google-api-core[grpc] >= 2.11.0, <3.0.0",

but in testing/constraints-3.9.txt.j2 . We have google-api-core==2.21.0

gapic-generator-python/gapic/templates/testing/constraints-3.9.txt.j2

Line 9 in bba0231

google-api-core==2.21.0