chore(login): Remove Vercel Analytics from login application (#10701)

This PR removes the Vercel Analytics integration from the login
application to reduce external dependencies and improve privacy.

# Which Problems Are Solved

cleaner csp

# How the Problems Are Solved

- Removed dependency: Uninstalled @vercel/analytics package from
package.json
- Updated layout component: Removed Analytics import and component usage
from layout.tsx
- Updated Content Security Policy: Removed Vercel domains
(https://va.vercel-scripts.com and https://vercel.com) from CSP
configuration in csp.js

apps/login/package.json

@@ -36,7 +36,6 @@
     "@heroicons/react": "2.1.3",
     "@radix-ui/react-tooltip": "^1.2.7",
     "@tailwindcss/forms": "0.5.7",
-    "@vercel/analytics": "^1.2.2",
     "@zitadel/client": "latest",
     "@zitadel/proto": "latest",
     "clsx": "1.2.1",