Add Support for Multi-Cluster Setup

[Fissium]

Is your feature request related to a problem?

Currently, Cruise Control (CC) does not natively support a multi-cluster setup. While the CC UI provides functionality to manage multiple clusters, the backend lacks direct support for multi-cluster operations. This feature is crucial for organizations managing multiple Kafka clusters and aiming to streamline their monitoring and optimization processes through CC.

Describe the solution you'd like

Introduce a clusters section in values.yaml to define multiple Kafka clusters.

Describe alternatives you've considered

NONE

Additional context

No response