Add ShouldSyncTensor interface (#84418)
Adding an `ShouldSyncTensor` interface to allow for the case of output pruning should a vendor not support retrieving the value of a certain output.
CC: @wconstab @JackCaoG @Krovatkin
Pull Request resolved: https://github.com/pytorch/pytorch/pull/84418
Approved by: https://github.com/wconstab
