Gameplay Debugger does not currently support basic input chords

A note from the user, seems like they have a fix for this already

I've changed the type of UGameplayDebuggerConfig::ActivationKey to FInputChord and with ony small changes to surrounding code it seems to work fine, allowing us to do this in DefaultEngine.ini:

```

[/Script/GameplayDebugger.GameplayDebuggerConfig]

ActivationKey=(Key=Apostrophe,bAlt=True,bShift=True)

```

The gameplay debugger currently only has a single FKey as the "Activation Key" type (UGameplayDebuggerConfig::ActivationKey). This does not allow for input chords to be used, which can be useful if you would like to make the debugger harder to activate if you have conflicting keybind.s