message: coverage: disambiguate HCM UtilityTest from other UtilityTests.
  Needed in a single coverage binary.
  Risk level: Low
  Testing: coverage run.
diff: @@ -1350,9 +1350,9 @@ TEST_F(FilterChainTest, InvalidConfig) {
  EnvoyException, "Error: multiple upgrade configs with the same name: 'websocket'");
  }
  -class UtilityTest : public testing::Test {
  +class HcmUtilityTest : public testing::Test {
  public:
  - UtilityTest() {
  + HcmUtilityTest() {
  // Although different Listeners will have separate FactoryContexts,
  // those contexts must share the same SingletonManager.
  ON_CALL(context_two_, singletonManager()).WillByDefault([&]() -> Singleton::Manager& {
  @@ -1363,7 +1363,7 @@ public:
  NiceMock<Server::Configuration::MockFactoryContext> context_two_;
  };
  -TEST_F(UtilityTest, EnsureCreateSingletonsActuallyReturnsTheSameInstances) {
  +TEST_F(HcmUtilityTest, EnsureCreateSingletonsActuallyReturnsTheSameInstances) {
  // Simulate `HttpConnectionManagerFilterConfigFactory::createFilterFactoryFromProtoTyped()`
  // call for filter instance "one".
  auto singletons_one = Utility::createSingletons(context_one_);
  