This was reported on slack

https://coreos.slack.com/archives/CSPS1077U/p1639584730229000

webhook service was missing from cluster

```
$ oc delete pipelinerun --all -n product-catalog-cicd
Error from server (InternalError): Internal error occurred: failed calling webhook "validation.webhook.pipeline.tekton.dev": Post "
https://tekton-pipelines-webhook.openshift-pipelines.svc:443/resource-validation?timeout=10s
": service "tekton-pipelines-webhook" not found
Error from server (InternalError): Internal error occurred: failed calling webhook "validation.webhook.pipeline.tekton.dev": Post "
https://tekton-pipelines-webhook.openshift-pipelines.svc:443/resource-validation?timeout=10s
": service "tekton-pipelines-webhook" not found
```

How to test the fix 🧑‍💻

1. Install operator latest build
2. Ensure that the installation is successful

$ oc get tektonconfig config
NAME READY REASON
config True

we test this fix by ensuring 3 things:
a. pipelines configMap(s) eg: config-defaults can be edited when even when webhook pod is down (scaled to 0)
b. config-defaults can be deleted and we can scale webhook back to 1
c. scaling the deployment should recreate the config-defaults configMap

3. scale down Pipelines webhook deployment

$ oc scale deployment -n openshift-pipelines tekton-pipelines-webhook --replicas=0

4. try editing any value in `config-defaults` configMap (whatever we try to change will not be applied so feel free to change any values eg: change 'default-service-account' from 'pipeline' to 'my-new-service-account'

$ oc edit configmap -n openshift-pipelines config-defaults

5. delete config-defaults configmap

$ oc delete configmap -n openshift-pipelines config-defaults

6. scale pipelines webhook deplolyment back to 1

$ oc scale deployment -n openshift-pipelines tekton-pipelines-webhook --replicas=1

{{}}
{{}}

7. ensure that  pipelines webhook deplolyment back to 1

$ oc get deployment -n openshift-pipelines tekton-pipelines-webhook
{{NAME                       READY   UP-TO-DATE   AVAILABLE   AGE }}
tekton-pipelines-webhook   1/1     1            1           69m

8. ensure that the config-defaults configMap is recreated

{{$ oc get configmap -n openshift-pipelines config-defaults }}
{{NAME              DATA   AGE }}
config-defaults   2      20s