We should update FeatureGatesIsolatedST and CustomResourceStatusIsolatedST with following:

• FeatureGatesIsolatedST
  • testSwitchingConnectStabilityIdentifiesFeatureGateOnAndOff
    • we should send messages in every phase of the test
    • in the end, disable the feature gate and send + receive the messages again
    • check the rolling update is really finished and that we are checking the correct file sink file on the correct pod
• CustomResourceStatusIsolatedST ✅
  • testKafkaUserStatus
    • Add option to reach NotReady status (keep authorization off in Kafka and create KU with ACLs)
  • testKafkaUserStatusNotReady
    • This could be merged with UserST#testUserWithNameMoreThan64Chars
  • testKafkaMirrorMakerStatus
    • Delete
  • testKafkaConnectAndConnectorStatus
    • Use not-existing bootstrap server instead of CPU values