dataset-operator lacks readiness probe

[starpit]

I think the dataset-operator deployment lacks a readiness probe. As a consequence, it is difficult to use standard Kubernetes mechanisms (e.g. kubectl wait --for=condition=ready to determine that datashim is ready for business.

For example, we sometimes see this:

Internal error occurred: failed calling webhook "mpod.datashim.io": failed to call webhook: Post "https://webhook-server.default.svc:443/mutate-v1-pod?timeout=10s": dial tcp 10.96.121.204:443: connect: connection refused reason:ItemCreationFailure