[CN-868] Allow to use TLS only with Hazelcast Enterprise version

[dzeromski-hazelcast]

Description

Allow to use TLS onky with only with Hazelcast Enterprise version. To do that we check if licenseKeySecretName was set.

Example:

apiVersion: hazelcast.com/v1alpha1
kind: Hazelcast
metadata:
  name: hazelcast
spec:
  clusterSize: 3
  tls:
    secretName: example

will fail with:

$ k apply -f tls.yaml 
The Hazelcast "hazelcast" is invalid: spec.tls: Required value: Hazelcast TLS requires enterprise version

[semihbkgr]

It LGTM 👍. Beside this PR, we would better to add license key check for every enterprise features. The another point, we can check the presence of license key secret as well.

[dzeromski-hazelcast]

It LGTM +1. Beside this PR, we would better to add license key check for every enterprise features. The another point, we can check the presence of license key secret as well.

Agree. We have already separate task to do it so we shouldn't forget about it: CN-827.