IAM: Add user search endpoint (#114542)
* wip: initial changes, api registration
* wip
* LegacySearch working with sorting
* Revert mapper change for now
* Clean up
* Cleanup, add integration tests
* Improve tests
* OpenAPI def regen
* Use wildcard search, fix lastSeenAt handling, add lastSeenAtAge
* Add missing files
* Fix merge
* Fixes
* Add tests, regen openapi def
* Address feedback
* Address feedback batch 2
* Chores
* regen openapidef
* Address feedback
* Add tests for paging
* gen apis
* Revert go.mod, go.sum. go.work.sum
* Fix + remove extra tracer parameter