silvio doblhofer

[Bug]: opentelemetry-proto discards InstrumentationScope attributes for logs

1

### What happened? When using the `SdkLoggerProvider::logger_with_scope` API to use an `InstrumentationScope` with attributes, these attributes are discarded when building the log export body via `OtlpHttpClient::build_logs_export_body` More precisely, [`group_logs_by_resource_and_scope`](opentelemetry_proto::transform::logs::tonic::group_logs_by_resource_and_scope) call...