Add ability to store monitoring data in VictoriaMetrics

[valyala]

VictoriaMetrics usually requires lower compute resources (CPU, RAM, disk space, disk IO) compared to InfluxDB when processing the same workloads. See these benchmarks and these case studies. VictoriaMetrics supports data ingestion via Influx line protocol (see these docs). It would be great if VictoriaMetrics could be used as monitoring backend instead of InfluxDB.

[chvvkumar]

@valyala

I have zero experience with victoriametrics. It looks interesting and I will check it out. But I can't gurantee support for it at this point. Although, a PR will be most welcome.