Log a warning when rate limit is active #195
Description
When the SDK removes an envelope item due to rate limiting, it should log a warning or error message, that surfaces even when the option debug = false. We recently had an investigation with a customer, and no events ended up in Sentry. It took us a while to determine that all envelope items were rate-limited. This was very confusing and frustrating to the customer, and they couldn't discover the problem themselves.
### Tasks
- [ ] https://github.com/getsentry/sentry-cocoa/issues/4456
- [ ] https://github.com/getsentry/sentry-java/issues/3817
- [ ] https://github.com/getsentry/sentry-dart/issues/2436
- [ ] JavaScript
- [ ] https://github.com/getsentry/sentry-react-native/issues/4193