Improve React Native Transactions

[krystofwoldrich]

Description

This is a meta issue capturing work related to improving React Native SDK Transactions.

### 🐞 Bugs
- [ ] https://github.com/getsentry/sentry-react-native/issues/3150
- [ ] https://github.com/getsentry/sentry-react-native/issues/3149
- [ ] https://github.com/getsentry/sentry-react-native/issues/3044
- [ ] https://github.com/getsentry/relay/pull/2358
- [ ] https://github.com/getsentry/sentry-react-native/pull/3307

┆Issue is synchronized with this Jira Improvement by Unito