fix(CI): replace runners-privilegedescalation with ubuntu-latest

Updates all workflow files and actionlint config to use ubuntu-latest
instead of the deprecated runners-privilegedescalation self-hosted runner.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/detect-pr-pipeline.yaml

@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   test-detection-logic:
-    runs-on: runners-privilegedescalation
+    runs-on: ubuntu-latest
     timeout-minutes: 2
     steps:
       - name: Checkout
@@ -21,7 +21,7 @@ jobs:
         run: bash scripts/test-detect-pipeline.sh
 
   detect-pipeline:
-    runs-on: runners-privilegedescalation
+    runs-on: ubuntu-latest
     timeout-minutes: 5
     outputs:
       pipeline-type: ${{ steps.detect.outputs.pipeline-type }}