Cluster name retro-compatibilty issue

[ClioSecurity]

On row #432, we have a hardcoded INDEXER cluster name, which breaks retrocompatibility if we want to use the assistant to add a new node to the previously existing cluster.

cluster.name: wazuh-indexer-cluster

This parameter should be added to the config.yml file instead.
We suggest changing the code to allow the installer to handle existing clusters as well. We have already modified the code and the contents of the wazuh-install-files.tar archive.

Thanks.