[14.x] feat: allow per-report log levels

[calebdw]

Hello!

There's been many times where I've wanted/needed to report an exception with a given level, in light of call-site context, rather than using the global defaults. This PR adds a level parameter to the report methods to achieve that---if null then the default behaviour is preserved:

try {
    // something
} catch (Throwable $t) {
    report($t, level: LogLevel::DEBUG);
}

cc: @timacdonald

Note

There's a chicken-egg problem here: orchestral/testbench-core#427 is the companion PR

Thanks!

[timacdonald]

I think this is pretty interesting and useful!

Right now, the only signal we have is handled vs unhandled, however that is not a great indicator of criticality.

It is in indicator that a user had a bad experience, sure, but a handled exception stopping users from signing up is more critical than an unhandled exception that occurs when a random setting hardly anyone touches throws when you toggle it.

This would allow us to communicate the business criticality of exceptions, which I'm all for.