The handler used by the remote storage backend currently exposes an endpoint for writing traces (https://github.com/jaegertracing/jaeger/blob/main/internal/storage/v2/grpc/handler.go#L154). This is currently a non-standard setup because extensions are usually for reads whereas the OTLP pipeline is for writes. As a result, we want to change the current test setup so that the gRPC client talks to an OTLP receiver instead of the remote storage backend extension.