Manually build AMIs for 11.7.3
!2991 (merged) hasn't been picked into the 11.7 stable branches, which caused the AMIs to not build for 11.7.3, and they need to be manually built.
!2991 (merged) hasn't been picked into the 11.7 stable branches, which caused the AMIs to not build for 11.7.3, and they need to be manually built.