Return nil when HNS endpoint ID is empty during deletion (#4105)

* Initial plan

* Fix: Return nil instead of error when HNS id is not found during endpoint deletion

Co-authored-by: behzad-mir <13154712+behzad-mir@users.noreply.github.com>

* Complete fix for HNS endpoint deletion issue

Co-authored-by: behzad-mir <13154712+behzad-mir@users.noreply.github.com>

* Fix: fix hns return in case of emty HNS ID

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: behzad-mir <13154712+behzad-mir@users.noreply.github.com>
Co-authored-by: Behzad Mirkhanzadeh <behzadm@microsoft.com>

Author: Copilot

network/endpoint_windows.go

@@ -530,8 +530,8 @@ func (nw *network) deleteEndpointImpl(_ netlink.NetlinkInterface, _ platform.Exe
 	}
 
 	if ep.HnsId == "" {
-		logger.Error("No HNS id found. Skip endpoint deletion", zap.Any("nicType", ep.NICType), zap.String("containerId", ep.ContainerID))
-		return fmt.Errorf("No HNS id found. Skip endpoint deletion for nicType %v, containerID %s", ep.NICType, ep.ContainerID) //nolint
+		logger.Info("No HNS id found. Skip endpoint deletion", zap.Any("nicType", ep.NICType), zap.String("containerId", ep.ContainerID))
+		return nil
 	}
 
 	if useHnsV2, err := UseHnsV2(ep.NetNs); useHnsV2 {