go-controller: Handle endpoint modify events.
go-controller: Handle endpoint modify events.

When one of the pods backing a service is deleted,
we should delete the endpoint from the load-balancer.

Signed-off-by: Gurucharan Shetty <a1872e333d0e52644f6125da2276530f7ebe5e77@ovn.org>

shettyg/ovn-kubernetes,shettyg/ovn-kubernetes,shettyg/ovn-kubernetes