Revert "Remove signing from shadow scans"

This reverts commit 1fe8d9e.

Author: eray-felek-sonarsource

.github/workflows/shadow_scans.yml

@@ -28,6 +28,9 @@ jobs:
 
       - uses: SonarSource/ci-github-actions/get-build-number@v1
 
+      - name: Setup DigiCert Client Tools
+        uses: SonarSource/ci-github-actions/code-signing@v1
+
       - uses: SonarSource/ci-github-actions/config-maven@v1
         env:
           CURRENT_VERSION: skip