feat(storage): allow non default service account (#11137)

* test(storage): re-enable DetectDirectConnectivity integration test

* feat(storage): allow non default service account

Author: frankyn

storage/grpc_client.go

@@ -101,7 +101,10 @@ func defaultGRPCOptions() []option.ClientOption {
 		)
 	} else {
 		// Only enable DirectPath when the emulator is not being targeted.
-		defaults = append(defaults, internaloption.EnableDirectPath(true), internaloption.EnableDirectPathXds())
+		defaults = append(defaults,
+			internaloption.EnableDirectPath(true),
+			internaloption.EnableDirectPathXds(),
+			internaloption.AllowNonDefaultServiceAccount(true))
 	}
 
 	return defaults

storage/integration_test.go

@@ -327,7 +327,6 @@ var readCases = []readCase{
 }
 
 func TestIntegration_DetectDirectConnectivity(t *testing.T) {
-	t.Skip("direct connectivity not yet available for CI")
 	ctx := skipHTTP("direct connectivity isn't available for json")
 	multiTransportTest(ctx, t, func(t *testing.T, ctx context.Context, bucket string, prefix string, client *Client) {
 		h := testHelper{t}