There are a few general collectors defined in the telemetry plugin: https://github.com/elastic/kibana/tree/452193fdba7c77815472889d1715b1ca341530ba/src/plugins/telemetry/server/collectors

We should extract them from this plugin because these collectors are also used by the monitoring plugin when retrieving Kibana stats (for monitoring purposes, not telemetry) and if telemetry.enabled: false, we won't register these collectors