feat: For the Noop one, it will be good if log from time to time that user is using a noops one.

[franciscolopezsancho]

          For the Noop one, it will be good if log from time to time that user is using a noops one. 

We should not log it each time, but let's say on every 100 calls to getTracer. If tracing is not configured, we write a log warning. As such users become aware that they are using a feature that is not enabled.

Originally posted by @octonato in #2069 (comment)