Enable show_report_validation_warnings by default

Changelog: changed

config/feature_flags/development/show_report_validation_warnings.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/353125
 milestone: '14.9'
 type: development
 group: group::threat insights
-default_enabled: false
+default_enabled: true

lib/gitlab/ci/parsers/security/common.rb

@@ -43,7 +43,7 @@ module Gitlab
           attr_reader :json_data, :report, :validate
 
           def valid?
-            if Feature.enabled?(:show_report_validation_warnings)
+            if Feature.enabled?(:show_report_validation_warnings, default_enabled: :yaml)
               # We want validation to happen regardless of VALIDATE_SCHEMA CI variable
               schema_validation_passed = schema_validator.valid?