As mentioned in the specs, it should be possible to optionally pass the InstrumentationScope attributes while creating/fetching a Tracer through TracerProvider.

Get a Tracer

This API MUST accept the following parameters:
 * name (required)
 * version (optional)
 * [since 1.4.0] schema_url (optional)
 * since 1.13.0] attributes (optional)

With #2004, the InstrumentationScope class already support storing the attributes.

The relevant span exporters - OTLP, InMemory, and OStream should be modified to support sending/dumping these attributes.

Also this would be an API/ABI breaking change (modifying/overloading the virtual method in the API), so need to be planned accordingly.