[ES|QL] Rerank command - Telemetry

[afoucret]

The telemetry should be enabled for the RERANK command.

Note: it seems that the only thing to do is to add TelemetryAware to the list of implemented interfaces for the Completion logical plan.

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)

[afoucret]

Merged #127731 so telemetry is enabled.