Revert "Remove codecov as it fails for some reason."
Revert "Remove codecov as it fails for some reason."

This reverts commit 9b8bcff142e1f5c14239cecb31a94065dc89bab5.

ceache/treadmill,ceache/treadmill,Morgan-Stanley/treadmill,Morgan-Stanley/treadmill,Morgan-Stanley/treadmill,ceache/treadmill