Turns on Backend DAST reports by default

changelogs/unreleased/dast_mr_reports_feature_flag.yml

+---
+title: Turns on backend MR reports for DAST by default
+merge_request: 22001
+author:
+type: changed

ee/app/controllers/ee/projects/merge_requests_controller.rb

@@ -12,7 +12,7 @@ module EE
 
         before_action only: [:show] do
           push_frontend_feature_flag(:sast_merge_request_report_api, default_enabled: true)
-          push_frontend_feature_flag(:dast_merge_request_report_api)
+          push_frontend_feature_flag(:dast_merge_request_report_api, default_enabled: true)
           push_frontend_feature_flag(:container_scanning_merge_request_report_api, default_enabled: true)
           push_frontend_feature_flag(:dependency_scanning_merge_request_report_api, default_enabled: true)
           push_frontend_feature_flag(:parsed_license_report, default_enabled: true)