Clean up fails for names > 63 chars

[torbsto]

In #390, hash-based trimming for Helm releases was already implemented. I now run into similar problems but with k8s resources. Having names bigger than 63 chars, KPOPs creates resources (in my case clean up jobs) with the same name and fails eventually because of it.

Also, it might fail because of auto-generated labels that are too long:

RuntimeError: Error: Job.batch "my-long-name" is invalid: [metadata.labels: Invalid value: "my-long-name": must be no more than 63 characters, spec.template.labels: Invalid value: "my-long-name: must be no more than 63 characters]