Improve Item Consumer event metric tracking to include item information
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### About
We've added event metrics for `ItemConsumer` objects - when a project/group enables/disables an AI Catalog item https://gitlab.com/gitlab-org/gitlab/-/merge_requests/200024.
However we should also add information about the AI Catalog item like ID and type, so we can answer questions about item popularity.
### Proposal
In the existing metrics (added in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/200024) additionally track:
- AI catalog `item` type
- AI catalog `item` ID
See https://docs.gitlab.com/development/internal_analytics/internal_event_instrumentation.
issue