We want to add the following settings to enable rerouting to a different dataset or namespace

elasticsearch.dynamic_dataset: true
elasticsearch.dynamic_namespace: true

In this case, we want to add those settings to the following list of datastream:

• kubernetes.container_logs
• system.syslog

Those settings are already allowed at datastream level in the package-spec.

Data streams that are already very specific, such as nginx.access are not candidates for now.

Similar work has already been done for input packages at #5989.