test(cache): point the CA test at the path the script was moved to

230d9a1e5e moved scripts/docker/cache/package-frontend/ca.sh to roles/svc-cache-package/files/shell/ca.sh as a pure rename. On origin/main the script stayed where it was, and 2756fd56f1 changed it there and added this test. The merge took the test without the move, so every case ran bash against a path that no longer exists and failed with exit 127.

Only the path changes. The script it exercises is the same file the rename produced, and every other PROJECT_ROOT path under tests/ was checked against git ls-files: registry-ca.sh is still at its old location and its test is correct, cert-gen.sh moved along but has no test.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/unit/python/scripts/docker/cache/package-frontend/test_ca.py

@@ -9,7 +9,7 @@ from pathlib import Path
 
 from utils.cache.files import PROJECT_ROOT
 
-SCRIPT = PROJECT_ROOT / "scripts" / "docker" / "cache" / "package-frontend" / "ca.sh"
+SCRIPT = PROJECT_ROOT / "roles" / "svc-cache-package" / "files" / "shell" / "ca.sh"
 NAME = "infinito-package-frontend.crt"
 STUB = '#!/usr/bin/env bash\nprintf "%s\\n" "$0 $*" >>"${STUB_LOG}"\n'
 PKI = "etc/pki/ca-trust/source/anchors"