[incubator/sparkoperator] fix invalid webhook init job (#23887)

* [sparkoperator] fix invalid webhook init job

Prior to this commit, helm validation for webhook-init-job of
incubator/sparkoperator failed in helm3 with the following error:

    Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(Job.spec): unknown field "metadata" in io.k8s.api.batch.v1.JobSpec

Issue was introduced by https://github.com/helm/charts/pull/23876 by
accident, as other jobs in this chart (incubator/sparkoperator) were not
affected.

Signed-off-by: Oleksandr Kovalchuk <anxolerd@outlook.com>

* Bump chart version

Signed-off-by: Oleksandr Kovalchuk <anxolerd@outlook.com>

incubator/sparkoperator/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 name: sparkoperator
 description: A Helm chart for Spark on Kubernetes operator
-version: 0.8.3
+version: 0.8.4
 appVersion: v1beta2-1.2.0-3.0.0
 keywords:
   - spark

incubator/sparkoperator/templates/webhook-init-job.yaml

@@ -10,13 +10,13 @@ metadata:
     app.kubernetes.io/instance: {{ .Release.Name }}
     app.kubernetes.io/managed-by: {{ .Release.Service }}
 spec:
-  metadata:
-    name: {{ include "sparkoperator.fullname" . }}-webhook-init
-    {{- if .Values.istio.enabled }}
-    annotations:
-      "sidecar.istio.io/inject": "false"
-    {{- end }}
   template:
+    metadata:
+      name: {{ include "sparkoperator.fullname" . }}-webhook-init
+      {{- if .Values.istio.enabled }}
+      annotations:
+        "sidecar.istio.io/inject": "false"
+      {{- end }}
     spec:
       serviceAccountName: {{ include "sparkoperator.serviceAccountName" . }}
       restartPolicy: OnFailure