webhook: PR build frequently failing

[stevenhorsman]

On several PRs recently I've found the webhook build failing e.g. https://github.com/confidential-containers/cloud-api-adaptor/actions/runs/12144031128/job/33862372335?pr=2173
with:

not ok 3 [webhook] test default parameters can be changed
# (in test file tests/e2e/webhook_tests.bats, line 149)
#   `kubectl apply -f -' failed
# runtimeclass.node.k8s.io/kata-wh-test created
# deployment.apps/peer-pods-webhook-controller-manager env updated
# peer-pods-webhook-controller-manager has been successfully rolled out
# peer-pods-webhook-controller-manager is ready
# All pods have the correct TARGET_RUNTIMECLASS value: kata-wh-test
# Error from server (InternalError): error when creating "STDIN": Internal error occurred: failed calling webhook "mwebhook.peerpods.io": failed to call webhook: Post "[https://peer-pods-webhook-webhook-service.peer-pods-webhook-system.svc:443/mutate-v1-pod?timeout=10s](https://peer-pods-webhook-webhook-service.peer-pods-webhook-system.svc/mutate-v1-pod?timeout=10s)": context deadline exceeded
# Error from server (NotFound): error when deleting "/home/runner/work/cloud-api-adaptor/cloud-api-adaptor/src/webhook/hack/pod.yaml": pods "nginx" not found

which is getting pretty annoying to have to re-run them, so would be good to investigate and fix