Add to Illuminate\Log\Events\MessageLogged logger channel name

[4n70w4]

Hi! I use few laravel log channels at the same time for different log management systems.

There are also third-party components that listen to the Illuminate\Log\Events\MessageLogged and try to handle to it.

But to implement all my event handling needs, I need information about the channel name to process only certain event logs. Or information about the log driver.

As a workaround, I can add a parameter to each withContext logger with the name of the logger or the features of processing its events. But there are disadvantages:

1. context parameter names should be standardized to integrate with third party libraries. when changing the names of the integration will break.
2. someone might forget to do it
3. the context value can be overridden or cleared in my code or third party code.
4. context values are also logged, this may not be desirable.

Adding channel name to the MessageLogged will be the most reliable way.

One of my cases: getsentry/sentry-laravel#637