Set correct namespace when copying resource_state_events
What does this MR do and why?
We use a bulk insert to create resource_state_events as part of the copy service. So no callbacks are executed where we set the correct namespace_id.
We already set namespace_id for resource_state_events in !196030 (merged). This part was missing on that MR and needs to be merged before we schedule the backfill on !196201 (merged)
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Related to #514592 (closed)