test: add portainer stack env guard

scripts/portainer-stack-env-exemptions.json

@@ -0,0 +1,7 @@
+{
+  "authentik": ["authentik-redis"],
+  "dev": ["dbx", "redis_plane"],
+  "foundry": ["5etools"],
+  "monitoring": ["uptime-kuma"],
+  "owncloud": ["redis"]
+}