Fix test data and also remove useless marking of multifiles in KotlinBuilder after 2ee7f2b "incremental annotation processing environment" as it makes the same thing and all results are ignored
GitOrigin-RevId: 379eb3f350539cb1ee27098eecb28931df73b626
Original commit: https://github.com/JetBrains/intellij-community/commit/ee2865c35c2dadc3651518b2760b5176835b251c