Add AI telemetry endpoint

What does this MR do and why?

Adds endpoint to store AI telemetry events.

@pshutsin from comment discussion in the MR

this MR we want to update extensions to send code_suggestions_XXXX events to usage_data/track_event API as well as to Snowplow (as it is currently). This MR is part of #452173

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Related to #457504