Add a Segment analytics `track` event that fires when a user successfully enables/disables the Atlas SQL Interface on a dedicated cluster (Admin API / UI PATCH .../clusters/{clusterName}/sqlInterface).

This was implemented in SQL-3275 (PATCH gRPC integration) but removed before merge: adding a Segment event is a "noteworthy analytics change" per the Cloud Analytics Changes protocol and needs the proper analytics/DGOV process rather than riding along with the endpoint wiring. The activity-feed audit event (NDSAudit SQL_INTERFACE_ENABLED/DISABLED) shipped in SQL-3275; only the Segment analytics event is deferred here.

Analytics change:

Adding a new Segment event SqlInterfaceStatusUpdated for Atlas SQL Interface status changes on dedicated clusters. The event fires on successful enable/disable actions and includes groupId, organizationId, cluster_id, and status (ON/OFF).
Expected impact: new event available for downstream analytics/reporting; volume should scale with SQL Interface toggle usage and is not expected to be high.
Projected deploy date: 8/31/26.
Contact: SQL Engines Team