Address feedback

Author: parthea

.librarian/generator-input/client-post-processing/bigtable-integration.yaml

@@ -957,6 +957,11 @@ replacements:
 
 
       @nox.session(python=DEFAULT_PYTHON_VERSION)
+      @nox.parametrize(
+          "protobuf_implementation",
+          ["python", "upb"],
+      )
+      def core_deps_from_source(session, protobuf_implementation):
       def core_deps_from_source(session):
           """Run all tests with core dependencies installed from source,
     count: 1