Bump google-auth from 2.22.0 to 2.23.0 in /tests (#4367)

Bumps [google-auth](https://github.com/googleapis/google-auth-library-python) from 2.22.0 to 2.23.0.
- [Release notes](https://github.com/googleapis/google-auth-library-python/releases)
- [Changelog](https://github.com/googleapis/google-auth-library-python/blob/main/CHANGELOG.md)
- [Commits](googleapis/google-auth-library-python@v2.22.0...v2.23.0)

---
updated-dependencies:
- dependency-name: google-auth
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/requirements.txt

@@ -205,9 +205,9 @@ forcediphttpsadapter==1.1.0 \
     --hash=sha256:0d224cf6e8e50eb788c9f5994a7afa6d389bac6dbe540b7dfd77a32590ad0153 \
     --hash=sha256:5e7662ece61735585332d09b87d94fffe4752469d5c0d3feff48746e5d70744b
     # via -r requirements.txt
-google-auth==2.22.0 \
-    --hash=sha256:164cba9af4e6e4e40c3a4f90a1a6c12ee56f14c0b4868d1ca91b32826ab334ce \
-    --hash=sha256:d61d1b40897407b574da67da1a833bdc10d5a11642566e506565d1b1a46ba873
+google-auth==2.23.0 \
+    --hash=sha256:2cec41407bd1e207f5b802638e32bb837df968bb5c05f413d0fa526fac4cf7a7 \
+    --hash=sha256:753a26312e6f1eaeec20bc6f2644a10926697da93446e1f8e24d6d32d45a922a
     # via
     #   -r requirements.txt
     #   kubernetes