Split out HealthCheckNodePort stuff from service/endpoint map Update()

In addition to actually updating their data from the provided list of
changes, EndpointsMap.Update() and ServicePortMap.Update() return a
struct with some information about things that changed because of that
update (eg services with stale conntrack entries).

For some reason, they were also returning information about
HealthCheckNodePorts, but they were returning *static* information
based on the current (post-Update) state of the map, not information
about what had *changed* in the update. Since this doesn't match how
the other data in the struct is used (and since there's no reason to
have the data only be returned when you call Update() anyway) , split
it out.

pkg/proxy/ipvs/proxier.go

@@ -1572,10 +1572,10 @@ func (proxier *Proxier) syncProxyRules() {
 	// Update service healthchecks.  The endpoints list might include services that are
 	// not "OnlyLocal", but the services list will not, and the serviceHealthServer
 	// will just drop those endpoints.
-	if err := proxier.serviceHealthServer.SyncServices(serviceUpdateResult.HCServiceNodePorts); err != nil {
+	if err := proxier.serviceHealthServer.SyncServices(proxier.svcPortMap.HealthCheckNodePorts()); err != nil {
 		klog.ErrorS(err, "Error syncing healthcheck services")
 	}
-	if err := proxier.serviceHealthServer.SyncEndpoints(endpointUpdateResult.HCEndpointsLocalIPSize); err != nil {
+	if err := proxier.serviceHealthServer.SyncEndpoints(proxier.endpointsMap.LocalReadyEndpoints()); err != nil {
 		klog.ErrorS(err, "Error syncing healthcheck endpoints")
 	}