Fix view issue in embedding_dense_backward decomp (#79857)
I was hitting:
```
File "/home/jansel/pytorch/torch/fx/experimental/proxy_tensor.py", line 66, in proxy_call
return CURRENT_DECOMPOSITION_TABLE[func_overload](*args, **kwargs)
File "/home/jansel/pytorch/torch/_decomp/decompositions.py", line 801, in embedding_dense_backward
indices_rank1 = indices.view(numel)
File "/home/jansel/pytorch/torch/fx/experimental/proxy_tensor.py", line 122, in __torch_dispatch__
return proxy_call(func_overload, args, kwargs)
File "/home/jansel/pytorch/torch/fx/experimental/proxy_tensor.py", line 86, in proxy_call
real_out = func_overload(*args, **kwargs)
File "/home/jansel/pytorch/torch/_ops.py", line 49, in __call__
return self._op(*args, **kwargs or {})
RuntimeError: view size is not compatible with input tensor's size and stride (at least one dimension spans across two contiguous subspaces). Use .reshape(...) instead.
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79857
Approved by: https://github.com/Chillee
