Remove user autocomplete feature flags
What does this MR do and why?
Removes feature flags [Feature flag] Rollout of `users_search_scoped_... (#524297 - closed) and [Feature flag] Enable users_search_scoped_to_au... (#520710 - closed) per #520710 (comment 2408069711) and updates documentation.
References
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Related to #520710 (closed)
Edited by Madelein van Niekerk