fix: update image tag handling to default to chart app version (kubesphere#300)

Signed-off-by: Gentleelephant <1132960613@qq.com>

Author: Gentleelephant

helm/templates/notificationmanagers.yaml

@@ -8,7 +8,7 @@ spec:
   {{- if .Values.notificationmanager.replicas }}
   replicas: {{ .Values.notificationmanager.replicas }}
   {{- end}}
-  image: {{ include "global.imageRegistry" .}}{{ .Values.notificationmanager.image.repo }}:{{ .Values.notificationmanager.image.tag }}
+  image: {{ include "global.imageRegistry" .}}{{ .Values.notificationmanager.image.repo }}:{{ .Values.notificationmanager.image.tag | default (printf "v%s" .Chart.AppVersion) }}
   imagePullPolicy: {{ .Values.notificationmanager.image.pullPolicy }}
   serviceAccountName: notification-manager-sa
   portName: webhook

helm/templates/operator.yaml

@@ -47,7 +47,7 @@ spec:
         - name: TZ
           value: {{ .Values.timezone }}
         {{- end }}
-        image: {{ include "global.imageRegistry" . }}{{ .Values.operator.containers.operator.image.repo }}:{{ .Values.operator.containers.operator.image.tag }}
+        image: {{ include "global.imageRegistry" . }}{{ .Values.operator.containers.operator.image.repo }}:{{ .Values.operator.containers.operator.image.tag | default (printf "v%s" .Chart.AppVersion) }}
         imagePullPolicy: {{ .Values.operator.containers.operator.image.pullPolicy }}
         name: notification-manager-operator
         ports:

helm/values.yaml

@@ -27,7 +27,7 @@ operator:
     operator:
       image:
         repo: kubesphere/notification-manager-operator
-        tag: v2.6.0
+#        tag: v2.6.0
         pullPolicy: IfNotPresent
       resources:
         limits:
@@ -45,7 +45,7 @@ operator:
 notificationmanager:
   image:
     repo: kubesphere/notification-manager
-    tag: v2.6.0
+#    tag: v2.6.0
     pullPolicy: IfNotPresent
   sidecar:
     image: