This MR adds support for creating `guidInstance` values for joystick devices in a way that matches native behavior. Our current method of creating a `guidInstance` value uses the device's rawinput handle, which changes each time a controller is plugged in. Fixes a bug in Rocket League where a controller plug/unplug cycle results in a new controller being detected each time. The process is like this: - Controller is connected, the game gets its `guidInstance` value from `EnumDevices()`, stores it and associates it with player 1. - Controller is disconnected. - The same controller is reconnected, the game calls `EnumDevices()`, and finds a new `guidInstance` value. - It then assumes this is a new controller, creates a new player, and behaves as though player 1's controller is unplugged. This MR implements `guidInstance` in a way that matches native, and ensures that the `guidInstance` value remains consistent. Doing things this way also makes it easier to add support for `DIPROP_JOYSTICKID` and `GUID_Joystick` in a future MR. I've implemented those in a branch [here](https://gitlab.winehq.org/cmcadams/wine/-/tree/WIP/dinput-instance-guid-v08) using this system. -- v4: dinput: Properly implement guidInstance for joystick devices. dinput: Create registry entries for HID joysticks. dinput: Only pass instance name string to device_instance_is_disabled(). https://gitlab.winehq.org/wine/wine/-/merge_requests/10364