Add workaround for IME Caps Lock issue (#4123)

* Add workaround for Japanese IME Caps Lock issue

* Changed tweak to reset modifier key rather than Caps Lock

* added tests

* Fixed test comment

* Moved environment initialization in KBM tests to TEST_METHOD_INITIALIZE

src/modules/keyboardmanager/test/TestHelpers.cpp

@@ -8,6 +8,7 @@ namespace TestHelpers
     {
         input.ResetKeyboardState();
         input.SetHookProc(nullptr);
+        input.SetSendVirtualInputTestHandler(nullptr);
         state.ClearSingleKeyRemaps();
         state.ClearOSLevelShortcuts();
     }