There was a specific error flow that was commented as only applying
to GKE. This was never tested specifically for GKE (only commented
as such) but that seems to be out of date and can be removed. If
the SAR endpoint does not exist it should be considered an error.
- moves these helper functions into e2e/framework/auth
- removes logging from helper functions
- in some cases explicitly returns errors that were implicitly
ignored/logged. In the situations where they should be ignored,
we explicitly check that the condition is met before ignoring it.
- fixes references of these methods to use the right package and
return values
