Instrumentation class needs to be modified to store key-value attributes. This is required for storing the event_name and attributes passed through LoggerProvider::GetLogger() method.

This is also consistent with the OTLP proto specs-

https://github.com/open-telemetry/opentelemetry-proto/blob/1e69bf2e789665a56eed3a3e9cf4fd51ff784ab6/opentelemetry/proto/common/v1/common.proto#L71