Many symintifications (#87604)
Adds
expand_inplace
conv conv_double_backward
convolution
adaptive_avg_pool2d_symint
_embedding_bag_backward_symint
cudnn_grid_sampler
cuda 32 bit indexing
nll_loss / nll_loss_2d
tensor split
pooling same mode
cudnn_is_acceptable
storage nbytes
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87604
Approved by: https://github.com/ezyang
