WHAT

Add `suspended` boolean property to Kafka instance admin endpoint

WHY

Enable a Kafka instance to be suspended and resumed from suspension

HOW

Extend the kas-fleet-manager Kafka admin patch endpoint to include a new optional boolean property suspended.

• When true, the control plane will add the label bf2.org/suspended=true to the ManagedKafka resource.
• When false, the control plane will remove the label bf2.org/suspended=true from the ManagedKafka resource.
• When null or omitted, the control plane will make no changes to the bf2.org/suspended=true label.

• Persist the value of suspended in the kafka requests table in the database to allow reconciliation (if required).
• Investigate: is there a possibility to skip addition of the new suspended column in the kafka requests table by using 'status' instead.

DONE

• PATCH /api/kafkas_mgmt/v1/admin/kafkas/{id} of the should accept a boolean parameter 'suspended'
• Unit/Integration tests created