* Removes discovery v1alpha1 API
* Replaces per Endpoint Topology with a read only DeprecatedTopology
in GA API
* Adds per Endpoint Zone field in GA API
EndpointSlice labels can be quite meaningful. They are used to indicate
the controller they are managed by and the Service they are associated
with. Changing these labels can have significant affects on how the
EndpointSlice is consumed so incrementing generation seems appropriate.
