chore: rename vmsingle and vmagent instances

kubernetes/thin/apps/monitoring/victoria-metrics/vm/agent.yaml

@@ -1,7 +1,7 @@
 apiVersion: operator.victoriametrics.com/v1beta1
 kind: VMAgent
 metadata:
-  name: vmagent-select-all
+  name: select-all
   namespace: monitoring
 spec:
   image:
@@ -12,6 +12,6 @@ spec:
   selectAllByDefault: true
   vmAgentExternalLabelName: vmagent
   remoteWrite: 
-  - url: http://vmsingle-vmsingle:8429/api/v1/write
+  - url: http://vmsingle-primary.monitoring.svc:8429/api/v1/write
   minScrapeInterval: 30s
   maxScrapeInterval: 24h

kubernetes/thin/apps/monitoring/victoria-metrics/vm/single.yaml

@@ -1,7 +1,7 @@
 apiVersion: operator.victoriametrics.com/v1beta1
 kind: VMSingle
 metadata:
-  name: vmsingle
+  name: primary
   namespace: monitoring
 spec:
   image: