This commit adds missing Elasticsearch SSL settings and replaces deprecated options being used on `xpack.monitoring.*` and `xpack.management.*` settings:
Changes:
- Updated deprecated monitoring and management Elasticsearch's SSL settings so no warnings are logged.
- Added monitoring settings support for file-based certificates and for the cipher suites: `xpack.monitoring.elasticsearch.ssl.certificate`, `xpack.monitoring.elasticsearch.ssl.key`, and `xpack.monitoring.elasticsearch.ssl.cipher_suites`.
- Added management settings support for file-based certificates and for the cipher suites: `xpack.management.elasticsearch.ssl.certificate`, `xpack.management.elasticsearch.ssl.key`, and `xpack.management.elasticsearch.ssl.cipher_suites`.
* add `ca_trusted_fingerprint` to core features (monitoring/central-management)
* Rely on released ES output
* fix: ensure commented-out examples in logstash.yml are functionally correct
* add admonition for how to get a trusted CA's fingerprint
* add product origin header to license checks
* add origin header to Central Management config fetcher
* add origin header to ES output for Monitoring pipeline
Since we default to data streams in 8.0.0, the internal collection for monitoring stops working due to the ES output trying to send data to the logs- data stream instead of the monitoring endpoint.
