feature: NetworkManager.exceptions advanced options

[Paradoks-Studio]

While we are at it, this feature request is related to this one:
#3605
My server is running in production since a few years now, and i noticed that sometimes logging exception can cost a lot on CPU and generate latency.
So i commented out the errors or transformed them into warnings or simple logs, and noticed that the lags they generated disapeared.

So the request, (don't know if it is worth performance wise, you will have to check ):
instead of making a bool like on #3605.
make an enum:
exceptionHandling:

• Disconnect and log errror
• Disconnect and log warning
• Log errror
• Log warning
• Do nothing ( !! )
  Some exception don't generate disconnections, so they will be handeled by the 3 last.

[MrGadget1024]

@Paradoks-Studio A big part of the log cost is stacktrace - you can turn that off here at the bottom of Player Settings:

Additionally, on server you can change to Console.WriteLine instead of Debug.Log.