Warn Analytics Instrumentation is used context version different from the latest in Iglu
Problem
Its possible to send events with older schema version to Snowplow which might lead to incidents like gitlab-com/gl-infra/production#17782 (closed)
Desired Outcome
Add warning/error to MR if latest schema version mismatch in Iglu and Gitlab Standard context.
Potential Solution
Use Danger rule to compare versions and add error/warning. Probably only if one of analytics instrumentation files was modified only.