overlays/input: allow ldd pad input

[Megamouse]

• Query LDD pad data in the overlay input loop

We usually only care for the rpcs3 input wrapper when we handle input in the overlays.
But LDD pads are basically extra pads registered by the game (like a custom controller or some instrument).
The input state of these LDD pads is populated by the game itself instead of us.
So in order to receive input of these pads in the overlays, we have to manually check the proper ldd_data buffer.

probably fixes #15164

[DarkRTA]

After testing this I can confirm that the issue is not fixed.

[carlmylo]

Tested on Windows with:

• RB3 PS3 Mustang PRO Guitar connected via MIDI to USB and set up via the I/O tab in Custom Configuration = Native Interface didn't respond, game responded
• RB3 PS3 Mustang PRO Guitar connected via Zadig/Passthrough = Native Interface didn't respond, game responded
• RB3 PS3 Wireless PRO Keyboard connected via Zadig/Passthrough (Linos tested this one) = Native Interface didn't respond, game responded
• Generic MIDI Keyboard connected via USB and set up via the I/O tab in Custom Configuration = Native Interface didn't respond, game responded
• Wii Rock Band Hofner Guitar Controller set up via Gamepad Configuration (MMJoystick) = Native Interface and game responded correctly. PS Guide button assignment also worked.

Logs if needed: Rock Band 3 [BLUS30463].log.gz

[Florin9doi]

I don't have instruments, but uDraw navigation is fixed by this PR together with #15606