[Helm] Honour serviceAccount.create value (#4003) (#4009)

Co-authored-by: Charith Ellawala <[email protected]>

Author: david-kow

deploy/eck-operator/templates/service-account.yaml

@@ -1,3 +1,4 @@
+{{- if  .Values.serviceAccount.create }}
 ---
 apiVersion: v1
 kind: ServiceAccount
@@ -10,3 +11,4 @@ metadata:
   annotations:
     {{- toYaml . | nindent 4 }}
 {{- end }}
+{{- end }}