Amalthea should clean up after itself if create_fn failed

[Panaetius]

Currently, if create_fn fails creating some resource, amalthea will just try again. But if e.g. creation of the service resource succeeded, all subsequent runs will fails with a CONFLICT because the service already exists. This also hides any original error message on the CRD with the CONFLICT error.

If the create_fn fails, it should delete all created resources so a subsequent try can start from a blank slate.