Newrelic agent support

[mightydok]

Is your feature request related to a problem? Please describe. No

Describe the solution you'd like Community need support of newrelic apm agents protocol in victoria metrics The VM already supports datadog agents, so supporting new agents shouldn't be a problem

Describe alternatives you've considered No

Additional context As i know newrelic agents send metrics over http in json format, thas all i know, need further investigation