[chore] restart job on failure (open-telemetry#26542)

**Description:**
Set up the telemetrygen job to restart on failure

**Link to tracking Issue:**
Fixes open-telemetry#24223


**Testing:**
See
open-telemetry#26530 (comment)
This investigation shows that the job fails to run sometimes. All other
deployments have a policy to restart on failure.

processor/k8sattributesprocessor/testdata/e2e/telemetrygen/job.yaml

@@ -26,4 +26,4 @@ spec:
 {{- end }}
  image: ghcr.io/open-telemetry/opentelemetry-collector-contrib/telemetrygen:latest
  name: telemetrygen
- restartPolicy: Never
+ restartPolicy: OnFailure