Add codeql configuration to prevent scanning vendor directory

.github/workflows/codeql-analysis.yml

@@ -69,3 +69,5 @@ jobs:
 
     - name: Perform CodeQL Analysis
       uses: github/codeql-action/analyze@v2
+      with:
+        config-file: ./codeql-config.yml

.github/workflows/codeql-config.yml

@@ -0,0 +1,5 @@
+name: "ARO CodeQL config"
+
+# Skip the vendor directory as codeqlv2 analysis falls over
+paths-ignore:
+- 'vendor/**'