Add otel-sdk to xray

Author: Kludex

propagator/opentelemetry-propagator-aws-xray/test-requirements-0.txt

@@ -15,5 +15,6 @@ typing_extensions==4.12.2
 urllib3==2.2.2
 wrapt==1.16.0
 zipp==3.19.2
+opentelemetry-sdk==1.16  # when updating, also update in pyproject.toml
 
 -e propagator/opentelemetry-propagator-aws-xray