Update of unit tests to use KRaft - part 6

[scholzj]

Type of change

• Task

Description

Part 6 of the unit test refactoring to use KRaft:

• KafkaAssemblyOperatorCustomCertMockTest is not dependent on ZooKeeper in any way and was just updated to use KRaft
• KafkaAssemblyOperatorNodePoolWatcherTest is not dependent on ZooKeeper in any way and was just updated to use KRaft
• KafkaAssemblyOperatorManualRollingUpdatesTest used ZooKeeper. The original class was kept in a copy as KafkaAssemblyOperatorManualRollingUpdatesZooBasedTest and the KafkaAssemblyOperatorManualRollingUpdatesTest class itself was updated to use KRaft
• KafkaAssemblyOperatorNonParametrizedTest used ZooKeeper in some tests. The original class KafkaAssemblyOperatorNonParametrizedTest has been used to keep the tests that did not need ZooKeeper based clusters. A new class KafkaAssemblyOperatorNonParametrizedZooBasedTest was created to hols the ZooKeeper related tests (this class will be removed when ZooKeeper support is removed).

Checklist

• Write tests
• Make sure all tests pass