Like serving use generatedName

Signed-off-by: Matthias Wessendorf <mwessend@redhat.com>

config/post-install/storage-version-migrator.yaml

@@ -15,23 +15,18 @@
 apiVersion: batch/v1
 kind: Job
 metadata:
-  # Adding a prefix to avoid naming conflict with previous version's post-install jobs,
-  # we cannot use `generateName` here as it's not supported by `kubectl apply -f`
-  #
-  # If `ttlSecondsAfterFinished` feature gate becomes generally available in the future,
-  # we can rely on that and keep using the same Job name.
-  name: v0.23-storage-version-migration
+  generateName: storage-version-migration-eventing-
   namespace: knative-eventing
   labels:
-    app: "storage-version-migration"
+    app: "storage-version-migration-eventing"
     eventing.knative.dev/release: devel
 spec:
   ttlSecondsAfterFinished: 600
   backoffLimit: 10
   template:
     metadata:
       labels:
-        app: "storage-version-migration"
+        app: "storage-version-migration-eventing"
         eventing.knative.dev/release: devel
       annotations:
         sidecar.istio.io/inject: "false"