Add API reference for InfluxDB 3 Cloud

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: api-docs/influxdb3/enterprise/

Aliased paths

• /influxdb3/cloud/api/database/
• /influxdb3/cloud/api/query-data/
• /influxdb3/cloud/api/table/
• /influxdb3/cloud/api/v3/

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.

• #operation/DeleteConfigureDatabase
• #operation/DeleteConfigureTable
• #operation/GetConfigureDatabase
• #operation/GetExecuteQuerySQL
• #operation/GetV1ExecuteQuery
• #operation/PostConfigureDatabase
• #operation/PostConfigureTable
• #tag/Database
• #tag/Table

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.

Compare the existing API reference in api-docs/influxdb3/enterprise/ with the four aliased Cloud paths, starting from content/influxdb3/cloud/request-information.md. Publish the corresponding Cloud content, remove the alias and hidden anchor spans, and run link-checker to confirm the listed paths and fragments work.