Do not create cluster key in `wazuh-install.sh`

[Selutario]

Description

In order to facilitate the configuration of the cluster and increase the security of communications, a Fernet key will no longer be used.

Now the key will be negotiated when starting the connection between workers and the master. Therefore, it won't be necessary to create one in the wazuh-install.sh script: https://github.com/wazuh/wazuh-packages/blob/167b7d2c98cd5cd543f7b8a545e8716243cf19c9/unattended_installer/install_functions/installCommon.sh#L125-L129

Others cluster configuration options, like disabled or name will no longer be available. Related tests should also be updated.