Disabling tracing throws error

[ibogdandi]

Hello,
when disabling tracing in the instrumentation.yaml configuration with monolog extension enabled the Instrumentation\Tracing\Instrumentation\LogHandler\TracingHandler still gets prepended to monolog.handlers.
This behaviour throws an error:
The service "monolog.logger" has a dependency on a non-existent service Istrumentation\Tracing\Instrumentation\LogHandler\TracingHandler".
Error is thrown because with tracing.enabled=false the extension is not loading the tracing.php which contains the TracingHandler service.

Suggestion is to check wether the tracing is enabled, and if so, prepend the monolog extension.