Create E2E tests that use real Cloudflare Workers and send the data directly to Sentry

Like we have with [react-send-to-sentry](https://github.com/getsentry/sentry-javascript/tree/63119eb1a6574f5acc3c80e8b07faf9fec357c21/dev-packages/e2e-tests/test-applications/react-send-to-sentry) we should also set up Cloudflare Workers to test things we can't locally. `wrangler` is a bit limited for some use cases and we need actual workers for that.

Start by reviewing the existing dev-packages/e2e-tests/test-applications/react-send-to-sentry application and the current Wrangler-based setup. Identify how a real Cloudflare Worker can be deployed for these tests and send data directly to Sentry. Done means E2E coverage runs against an actual Worker and verifies the expected Sentry data.

Scritto dal modello di indicizzazione a partire dal testo della issue.