[loggingexporter] detailed verbosity level should also log exemplars

[matej-g]

Is your feature request related to a problem? Please describe.
When doing various testing / debugging with the detailed verbosity, it would be nice to see exemplars attached to a metric data points.

Describe the solution you'd like
Logging exporter, when configured with detailed verbosity, logs exemplar information.

Describe alternatives you've considered
No alternative.

Additional context
I'd be happy to put in the work to add this feature.

[mx-psi]

Makes sense to me to add this :)

[shivanshuraj1333]

I'd like to work on this, Can I get it assigned to me? Thanks!

[mx-psi]

@shivanshu1333, I believe @matej-g intended to work on this, I will leave this up to you two to discuss

[matej-g]

Feel free to go for it @shivanshu1333, I'd be happy to assist or review if any help will be needed 🙂

[oliver-zhang]

@shivanshu1333 Are you starting on this ?

[shivanshuraj1333]

Hi @oliver-zhang I've done some work would try to open a PR this weekend.

[matej-g]

Hey folks 👋, I opened #8142 in order to try and speed up the process a bit, I hope that's fine. Reviews are welcome!