Update InfluxDB v2 tutorial

See the new [InfluxDB k6 extension](https://github.com/grafana/xk6-output-influxdb), the new instructions should be similar as: [Elasticsearch](https://k6.io/docs/results-output/real-time/elasticsearch/), [TimescaleDB](https://k6.io/docs/results-output/real-time/timescaledb/), [Prometheus RW](https://k6.io/docs/results-output/real-time/prometheus-remote-write/), [Dynatrace](https://k6.io/docs/results-output/real-time/dynatrace/)...

Also, include [`#179` Document all InfluxDB output options ](https://github.com/grafana/k6-docs/issues/179).

The new instructions will deprecate the existing [InfluxDB+Grafana tutorial](https://k6.io/docs/results-visualization/influxdb-+-grafana/), and relates to https://github.com/grafana/k6-docs/issues/1012

Start with the existing InfluxDB+Grafana tutorial and compare its structure with the Elasticsearch, TimescaleDB, Prometheus remote-write, and Dynatrace instructions. Review the InfluxDB k6 extension and issue #179 for the output options, then update the tutorial and account for the deprecation and relationship to issue #1012.

Written by the indexing model from the issue text.