Support EntityRefs in debug exporter

[dmitryax]

Write entity refs information as part of the resource section. Use this prototype as reference
https://github.com/open-telemetry/opentelemetry-collector/pull/11958/files#diff-5481634049eec77c74bfabaf16f7833d2cc998b3c01b8a5560a27569dc397aa9

[7h3-3mp7y-m4n]

Can I work on it?

[dmitryax]

@7h3-3mp7y-m4n , sure. Thank you!

[theletterf]

@dmitryax The issue has no description.

• What's the expected outcome?
• What should the output look like?
• Should this include all signals?
• At which verbosity level should this work?

[dmitryax]

@theletterf, updated the description