Make the `logging` integration send Sentry logs

Make the `logging` integration create breadcrumbs and issues. 

Something like this:

```python
sentry_sdk.init(
    ...
    _experiments={
        "enable_sentry_logs": True
    }
)

logger = logging.Logger("some-logger")
logger.info('Finished sending answer! #chunks=%s', chunks).  # <-- will send sentry logs
```