retry - enable NVFuser by default
Enable NVFuser in OSS.
Retry of #77213, because it was breaking torchvision tests.
Fix in #77471 has been verified by jjsjann123
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77579
Approved by: https://github.com/eellison, https://github.com/malfet, https://github.com/atalman, https://github.com/seemethere
