[slimtensor] Add aoti_torch_assign_tensors_out for SlimTensor #16970
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Pull Request resolved: #16450 Add SlimTensor-based `aoti_torch__reinterpret_tensor()` - Creates a reinterpreted view of a tensor with new sizes, strides, and storage offset using SlimTensor's `as_strided()` method. The view shares the same underlying storage. ghstack-source-id: 336360654 @exported-using-ghexport Differential Revision: [D90126249](https://our.internmc.facebook.com/intern/diff/D90126249/)
Pull Request resolved: #16451 Add SlimTensor-based `aoti_torch_copy_()` - Copies data from source tensor to destination tensor. Delegates to SlimTensor's `copy_()` which handles all device combinations (CPU-CPU, CPU-CUDA, CUDA-CPU, CUDA-CUDA). ghstack-source-id: 336360663 @exported-using-ghexport Differential Revision: [D90126246](https://our.internmc.facebook.com/intern/diff/D90126246/)
Pull Request resolved: #16452 Add SlimTensor-based `aoti_torch_assign_tensors_out()` - Creates a new tensor handle that moves the ownership of storage from the source tensor to ret tensor via SharedPtr. ghstack-source-id: 336360658 @exported-using-ghexport Differential Revision: [D90126243](https://our.internmc.facebook.com/intern/diff/D90126243/)
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16970
Note: Links to docs will display an error until the docs builds have been completed. ⏳ 36 Pending, 2 Unrelated FailuresAs of commit a5597ba with merge base 8aab61b ( BROKEN TRUNK - The following jobs failed but were present on the merge base:👉 Rebase onto the `viable/strict` branch to avoid these failures
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #16452 by @Gasoonjia
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/gasoonjia/94/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/94/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/gh/gasoonjia/93/orig
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/94/orig
Differential Revision: D90126243
@diff-train-skip-merge