[query] use python:3.7 for pip-compile in hail (#12491)
[query] use python:3.7 for pip-compile in hail (#12491)


hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail