Set up inlining for InvokeWithoutArgs when passed a functor.

Actions can now be implicitly constructed from zero-argument callables. There is no need to create wrapper objects using InvokeWithoutArgs().

PiperOrigin-RevId: 949656497
Change-Id: Ida2bc38e446e7b33aaf185ec593caf2a1959138e

googlemock/test/gmock-more-actions_test.cc

@@ -1026,9 +1026,8 @@ TEST(DoAllTest, NoArgs) {
 
 TEST(DoAllTest, MoveOnlyArgs) {
   bool ran_first = false;
-  Action<int(std::unique_ptr<int>)> a =
-      DoAll(InvokeWithoutArgs([&] { ran_first = true; }),
-            [](std::unique_ptr<int> p) { return *p; });
+  Action<int(std::unique_ptr<int>)> a = DoAll(
+      [&] { ran_first = true; }, [](std::unique_ptr<int> p) { return *p; });
   EXPECT_EQ(7, a.Perform(std::make_tuple(std::unique_ptr<int>(new int(7)))));
   EXPECT_TRUE(ran_first);
 }