Don't prepend service name to generic alerts

Before this commit, the logic would prepend the name of the container
to the alertname. The container name is used internally to determine
how to gather the needed metrics. As the container name may not be same
as the name of the service, this could be confusing.

enterach alert contains all the necessary information about the affected
service in the description. That makes prepending the name redundant.

pkg/comp-functions/functions/common/nonsla/alerting.go

@@ -33,7 +33,7 @@ var (
 
 		pvFillUp: func(name, namespace string) promV1.Rule {
 			return promV1.Rule{
-				Alert: name + "PersistentVolumeFillingUp",
+				Alert: "PersistentVolumeFillingUp",
 				Annotations: map[string]string{
 					"description": "The volume claimed by the instance {{ $labels.name }} in namespace {{ $labels.label_appcat_vshn_io_claim_namespace }} is only {{ $value | humanizePercentage }} free.",
 					"runbook_url": "https://runbooks.prometheus-operator.dev/runbooks/kubernetes/kubepersistentvolumefillingup",
@@ -52,7 +52,7 @@ var (
 		},
 		pvExpectedFillUp: func(name, namespace string) promV1.Rule {
 			return promV1.Rule{
-				Alert: name + "PersistentVolumeExpectedToFillUp",
+				Alert: "PersistentVolumeExpectedToFillUp",
 				Annotations: map[string]string{
 					"description": "Based on recent sampling, the volume claimed by the instance {{ $labels.name }} in namespace {{ $labels.label_appcat_vshn_io_claim_namespace }} is expected to fill up within four days. Currently {{ $value | humanizePercentage }} is available.",
 					"runbook_url": "https://runbooks.prometheus-operator.dev/runbooks/kubernetes/kubepersistentvolumefillingup",
@@ -71,7 +71,7 @@ var (
 		},
 		memCritical: func(name, namespace string) promV1.Rule {
 			return promV1.Rule{
-				Alert: name + "MemoryCritical",
+				Alert: "MemoryCritical",
 				Annotations: map[string]string{
 					"description": "The memory claimed by the instance {{ $labels.name }} in namespace {{ $labels.label_appcat_vshn_io_claim_namespace }} has been over 85% for 2 hours.\n  Please reduce the load of this instance, or increase the memory.",
 					"runbook_url": "https://hub.syn.tools/appcat/runbooks/vshn-generic.html#MemoryCritical",