Keyboard Manager requires integration tests for the remapping logic

[arjunbalgovind]

Currently each of the remap methods have been unit tested, i.e. Remapping keys and remapping shortcuts. This doesn't however test the scenarios where a user remaps a key, and those key remaps are reflected in the shortcut remap. To do this we need to add integration tests for the HandleKeyboardHookEvent method https://github.com/microsoft/PowerToys/blob/master/src/modules/keyboardmanager/dll/dllmain.cpp#L381-L447