According to the Strimzi Proposal #50, the KRaft mode should be available only through `KafkaNodePool` resources in the future. This is not delivered as part of the initial Node Pool PR #8551 because it would break all the system tests related to KRaft. So right now, it allows to use KRaft through KafkaNodePools or without them. 

We first need to update the STs to use KRaft only through Kafka Node Pools before implementing this part of the proposal. Once the system tests are updated, this should be implemented in the code.

Created by Strimzi#8592