Start adding cronjob to do the clearup for us

todo:
* Service account/secret to access tekton resources
* Tune - I dont know what happens if you clean up taskruns only for
  example

k8s/stage/osh-client-tekton/tekton-cleanup-cronjob.yaml

@@ -0,0 +1,21 @@
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: tekton-terminator
+  namespace: pct-security-tooling
+spec:
+  schedule: "*/10 * * * *"
+  concurrencyPolicy: Forbid
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: tekton-cleanup
+            image: quay.io/openshift-pipeline/openshift-pipelines-cli-tkn:1.11
+            imagePullPolicy: IfNotPresent
+            command:
+            - /bin/sh
+            - -c
+            - tkn pipelinerun delete --keep 10 && tkn taskrun delete --keep 20
+          restartPolicy: OnFailure

k8s/stage/osh-client-tekton/tekton-prune.yaml

@@ -1,8 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: pct-security-tooling
-  annotations:
-    operator.tekton.dev/prune.resource: taskrun, pipelinerun
-    operator.tekton.dev/prune.schedule: '*/10 * * * *'
-    operator.tekton.dev/prune.strategy.keep: "10"