Expose PlayerCameraManager's bClientSimulatingViewTarget to BP

Currently I am trying to do client-side handling of a view target and currently, there is no way to achieve this in Blueprint.

In C++ you can simply set bClientSimulatingViewTarget to true in order to achieve this. It would be nice if this property was exposed to blueprints.

Pull request: https://github.com/EpicGames/UnrealEngine/pull/4119