perf(UEHelpers): Fast path for GetPlayerController

[UE4SS]

Description

It now tries to get the player controller via GameInstance.LocalPlayers[0], and only falls back on the slow FindAllOf method if that fails.

Type of change

• Other... Please describe: Performance improvement

How has this been tested?

The following script was run, followed by jumping in Palworld.
No testing has been performed on any other game, or on any server software.

RegisterHook("/Script/Engine.Character:CanJumpInternal", function(ContextParam)
    local Controller = UEHelpers.GetPlayerController()
    if Controller:IsValid() then
        print(string.format("Controller: %s\n", Controller:GetFullName()))
    end
end)

[joric]

Much faster now, after the performance-killing change in #1047 (I was getting like 10 fps, instead of 60), but now it also returns debug camera controller (if active). It broke my teleport code (DebugCamera.lua), because in debug camera mode it returns debug camera controller and there's no pawn there so you'd need a fallback function to get the actual player controller with a pawn.