DB Semantic convention attributes need to be updated

I am not seeing `server.address` in `db_client_operation_duration_seconds_count` metric. I think this is because we don't actually add the attribute: https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/blob/main/pkg/export/attributes/attr_defs.go#L277-L284

Can we review the semantic conventions and update the implementation to match?