As a Site Reliability Engineer
I want to specify the metrics to be sent to Datadog from Aiven services via Datadog integration rather than sending them all
so that I can reduce the unnecessary load of Datadog Agent on my services in Aiven and remove the amount of unused data sent to Datadog.

Partially it's implemented via datadoguserconfig, but it limited only to minority of the metrics, like, for example, for Aiven Kafka only kafka.log.logsize , kafka.log.logstartoffset, kafka.log.logendoffset are available, while the other important ones (like kafka.consumerlag or kafka.topic.messagesin.rate) are not.
So adding all the available metrics to datadoguser_config seems to be the natural way of doing that.