Undici integration final touches

[AbhiPrasad]

### Undici
- [ ] https://github.com/getsentry/sentry-javascript/pull/7582
- [ ] https://github.com/getsentry/sentry-javascript/pull/7628
- [ ] https://github.com/getsentry/sentry-javascript/pull/7646
- [ ] https://github.com/getsentry/sentry-javascript/pull/7648
- [ ] https://github.com/getsentry/sentry-javascript/pull/7650
- [ ] https://github.com/getsentry/sentry-docs/pull/6556