Add the sample data reference for InfluxDB 3 Cloud

[ritwika314]

Cloud pages don't exist yet at the paths below, so content/influxdb3/cloud/request-information.md aliases them to a "Request more information" page. Publish the real content and remove the alias.

Closest existing equivalent to source from: /influxdb3/enterprise/reference/sample-data/

Aliased paths

• /influxdb3/cloud/reference/sample-data/

Anchors the new content must provide

Shared content deep-links to these fragments. They're currently faked as hidden <span>s in request-information.md; remove each span once the real heading exists.

• #get-started-home-sensor-data
• #home-sensor-data
• #write-home-sensor-data-to-influxdb
• #write-the-home-sensor-data-to-influxdb

Done when

• Content is published (or the linking shared content is gated for Cloud)
• The alias is removed from request-information.md
• Any hidden anchor <span>s that belonged to these paths are removed
• link-checker passes

Part of #7391.