Add tests for Kafka resource creation and deletion, and fix dataset deletion issue

[rbardaji]

This pull request introduces comprehensive tests for the creation and deletion of Kafka resources and the associated organization. Key improvements include:

• Creation of a Kafka resource under a newly created organization.
• Successful deletion of the Kafka resource using its dataset ID.
• Removal of the organization after the Kafka resource is deleted.
• Fix for the dataset deletion function to correctly handle dataset IDs and ensure proper cleanup.
• The test ensures that all components are created and cleaned up properly, maintaining system integrity.