Adding alternative downsampling examples - Using Quix

[SteveRosam]

Adding alternative downsampling examples - Using Quix.

This PR includes changes to:

• Dedicated
• Cloud(TSM)
• OSS
• Clustered

Quix is collaborating with Influxdata to act as a pure Python alternative to Kapacitor+Flux.

The audience is folks who:

Know Python already and/or don't want to learn a DSL, and possibly those who want to process data more "Pythonically" rather than mixing SQL syntax and Python. FYI: Quix is both a runtime platform (Quix Cloud) and data processor (Quix Streams Python library). The aim of the articles is to show how downsampling can be done in a continuous real-time process using pure Python.

[x] Signed the InfluxData CLA (if necessary) [x] Rebased/mergeable