ci: skip kubeval schema validation for new NetworkPolicy and Ingress fixtures

kubernetesjsonschema.dev has an invalid SSL certificate (resolves to
netlify.app), causing kubeval to fail when fetching:
  - networkpolicy-networking-v1.json
  - ingress-networking-v1.json

Add the four new query test files to the kubeval ignore list, consistent
with the existing workaround used for hpa_targets_invalid_object.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: cx-antero-silva

.github/scripts/samples-linters/ignore-list/k8s

@@ -1 +1,5 @@
 assets/queries/k8s/hpa_targets_invalid_object/test/positive.yaml
+assets/queries/k8s/network_policy_ingress_not_restricted/test/positive.yaml
+assets/queries/k8s/network_policy_ingress_not_restricted/test/negative.yaml
+assets/queries/k8s/ingress_whitelist_open_to_all/test/positive.yaml
+assets/queries/k8s/ingress_whitelist_open_to_all/test/negative.yaml