ServiceAccount for Pruner is missing on install

Expected Behavior

Pruner is running.

Actual Behavior

Error events from the tekton-pipelines namespace: Error creating: pods "tekton-resource-pruner-8nvxx-29436900-" is forbidden: error looking up service account tekton-pipelines/tekton-resource-pruner: serviceaccount "tekton-resource-pruner" not found.

And from the default namespace: Internal error occurred: failed calling webhook "validation.webhook.pruner.tekton.dev.global": failed to call webhook: Post "https://tekton-pruner-webhook.tekton-pipelines.svc:443/validate-configmap?timeout=5s": service "tekton-pruner-webhook" not found

Steps to Reproduce the Problem

1. Fresh install using kubectl apply -f https://infra.tekton.dev/tekton-releases/operator/previous/v0.78.1/release.yaml

Additional Info

• Kubernetes version: k3s

  Output of kubectl version:

Client Version: v1.33.6+k3s1
Kustomize Version: v5.6.0
Server Version: v1.33.6+k3s1

• Tekton Pipeline version:

  Output of tkn version or kubectl get pods -n tekton-pipelines -l app=tekton-pipelines-controller -o=jsonpath='{.items[0].metadata.labels.version}': v1.6.0

Start by reproducing the fresh install with the referenced v0.78.1 release.yaml and inspect the installed resources in the tekton-pipelines namespace. The fix is complete when the pruner ServiceAccount and webhook service are created and Pruner runs without the reported errors.