Add logging to Resource detection

[mwear]

Is your feature request related to a problem? Please describe.
Resource auto-detection is great when it works, but hard to debug when it doesn't. Having an option to turn on debug logging will help figure out what Resources were detected, and what data the detectors received.

Describe the solution you'd like
Pass a logger, or perhaps a ResourceDetectionConfig object with a logger into the detectResources method. Log at debug level if a Resource was detected, and the data discovered during the detection.

Describe alternatives you've considered
Open to any other reasonable approaches.

[adamegyed]

Hi, I'm a Google Intern looking to start contributing to OpenTelemetry. Could I be assigned to this issue?