fix: don't run vulneatbility scan on tilt and test images

Author: lalitadithya

.github/workflows/vuln-scan.yml

@@ -55,7 +55,7 @@ jobs:
           format: 'sarif'
           output: ${{ env.SARIF_OUTPUT }}
           severity: ${{ env.SEVERITY_LEVELS }}
-          skip-dirs: 'vendor,node_modules,distros/kubernetes'
+          skip-dirs: 'vendor,node_modules,distros/kubernetes,tests,tilt'
           limit-severities-for-sarif: true
 
       - name: Check SARIF file exists