Is your feature request related to a problem? Please describe.
We are running our fleets throughout different clusters and independently of one and other and use the webhook autoscaler to make sure that we have necessary sizes on all the fleets.
With this solution we are allocating game servers based on labels and not on fleet names, this means that on the webhook autoscaler endpoint we have no idea to determine the size since the request does not contain any metadata at all regarding the fleet in question.

Describe the solution you'd like
We want to extend the FleetAutoscaleRequest to include the fleet metadata when reporting to the service(s).

Describe alternatives you've considered
We made changes to the URL used for the webhook but that means that we have to update the URL every time we add new label and/or annotations