Googletest export

Refactor the `Invoke` and `InvokeWithoutArgs` actions:
 - Replace pump'd classes and functions with templates.
 - Make the polymorphic actions be polymorphic functors instead.
 - Fix Invoke(Callback*) to work with subclasses of the callbacks, instead of trying to diagnose that in gmock_doctor.

PiperOrigin-RevId: 229604112

googlemock/test/gmock-spec-builders_test.cc

@@ -78,6 +78,7 @@ using testing::Expectation;
 using testing::ExpectationSet;
 using testing::GMOCK_FLAG(verbose);
 using testing::Gt;
+using testing::IgnoreResult;
 using testing::InSequence;
 using testing::Invoke;
 using testing::InvokeWithoutArgs;