test(org): enahcning test for creating org with custom id (#10247)

# Which Problems Are Solved

Enhancing integration test for creating org; currently the test does not
check if the created org has the assigned custom id, this will resolve
this issue.

internal/api/grpc/org/v2beta/integration_test/org_test.go

@@ -208,7 +208,9 @@ func TestServer_CreateOrganization(t *testing.T) {
 				Name: gofakeit.AppName(),
 				Id:   gu.Ptr("custom_id"),
 			},
-			want: &v2beta_org.CreateOrganizationResponse{},
+			want: &v2beta_org.CreateOrganizationResponse{
+				Id: "custom_id",
+			},
 		},
 	}
 	for _, tt := range tests {