Replace complex workflow with simplified version

- Deleted old reusable-trufflehog.yml (338 lines, security issues)
- Renamed reusable-trufflehog-simple.yml to reusable-trufflehog.yml
- Updated org-required workflow to use standard filename
- Same functionality, 56% less code, security fixes included
- Clean, maintainable workflow optimized for current use case

Author: isaiah-grafana

.github/workflows/org-required-trufflehog.yml

@@ -19,7 +19,7 @@ permissions:
 jobs:
   secret-scan:
     name: TruffleHog Secret Scan
-    uses: ./.github/workflows/reusable-trufflehog-simple.yml
+    uses: ./.github/workflows/reusable-trufflehog.yml
     with:
       # Simplified workflow - only what you need
       fail-on-verified: "true"       # Always fail on real secrets