root/pypi: links for gapic-google-cloud-monitoring-v3

root/pypi gapic-google-cloud-monitoring-v3-0.15.3.tar.gz
root/pypi gapic-google-cloud-monitoring-v3-0.15.0.tar.gz
root/pypi gapic-google-cloud-monitoring-v3-0.14.0.tar.gz