[10.x] Add Method to Report only logged exceptions

[joelharkes]

Added a method that is easier to overwrite in the Exception Handler class or to listen to with APM packages.

For example the Datadog APM tracer would otherwise trace for all exceptions, even those that don't even get logged.

Datadog APM error tracker:

\DDTrace\hook_method(
            Handler::class,
            'reportError',
            function ($This, $scope, $args) {
                $span = \DDTrace\root_span();
                if (null === $span) {
                    return;
                }
                // from: https://github.com/DataDog/dd-trace-php/blob/master/src/Integrations/Integrations/Integration.php
                /** @var \Throwable $exception */
                $exception = $args[0];
                $span->meta[\DDTrace\Tag::ERROR_MSG] = $exception->getMessage();
                $span->meta[\DDTrace\Tag::ERROR_TYPE] = get_class($exception);
                $span->meta[\DDTrace\Tag::ERROR_STACK] = $exception->getTraceAsString();
            }
        );