Fix ALS K8SServiceRegistry didn't remove the correct entry (#6658)

* Fix ALS K8SServiceRegistry didn't remove the correct entry

* Add changes
Co-authored-by: NZhenxu Ke <kezhenxu94@apache.org>

CHANGES.md

@@ -63,6 +63,7 @@ Release Notes.
 * Optimize the self monitoring grafana dashboard.
 * Enhance the export service.
 * Add function `retagByK8sMeta` and opt type `K8sRetagType.Pod2Service` in MAL for k8s to relate pods and services.
+* Fix ALS K8SServiceRegistry didn't remove the correct entry.
 * Using "service.istio.io/canonical-name" to replace "app" label to resolve Envoy ALS service name
 
 #### UI

oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/k8s/K8SServiceRegistry.java

@@ -209,7 +209,7 @@ public class K8SServiceRegistry {
 
     protected void removeService(final V1Service service) {
         ofNullable(service.getMetadata()).ifPresent(
-            metadata -> idServiceMap.remove(metadata.getUid())
+            metadata -> idServiceMap.remove(metadata.getNamespace() + ":" + metadata.getName())
         );
     }