Add pull request workflow for py3 branch
Add pull request workflow for py3 branch

the-blue-alliance/the-blue-alliance,fangeugene/the-blue-alliance,the-blue-alliance/the-blue-alliance,fangeugene/the-blue-alliance,fangeugene/the-blue-alliance,fangeugene/the-blue-alliance,the-blue-alliance/the-blue-alliance,the-blue-alliance/the-blue-alliance,fangeugene/the-blue-alliance,the-blue-alliance/the-blue-alliance,the-blue-alliance/the-blue-alliance,fangeugene/the-blue-alliance