Add support for reporting metrics to Influx API v2

[riker09]

As far as I can tell setting the environment variables for configuring reporting metrics to an InfluxDB instance are only working with the older v1 API.

It would probably the easiest to support the newer v2 API by adding some new env vars:

• INFLUXDB2_URL
• INFLUXDB2_BUCKET
• INFLUXDB2_ORG and/or INFLUXDB2_ORGID

I'm not sure if the data can still be written with the curl parameter --data-binary. In a quick test --data-raw did seam to to work, though.

Documentation:
https://docs.influxdata.com/influxdb/v1.8/guides/write_data/#write-data-using-the-influxdb-api
https://docs.influxdata.com/influxdb/v2.6/api/#operation/PostWrite