Remove `torch.save`-related logic from pickler (#25502)
Summary:
The Pickler previously had a distinction between tensors that would be inlined in 1 pickle binary (matching the format of `torch.save()`) and tensors that are saved elsewhere with only a reference stored in the binary. This PR moves that distinction out to `torch::pickle_save` to match the eager Python interface.
The change can be seen in `register_prim_ops.cpp` where the call to `jit::pickle` is now `torch::pickle_save`
](https://our.intern.facebook.com/intern/diff/17175215/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25502
Pulled By: driazati
Differential Revision: D17175215
fbshipit-source-id: 8c9a21327cc79eaf6a0e488ea99e305be52f82b1
