[ET Device Support] Add NonConstBufferDevice schema for per-buffer device mapping#19499
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…vice mapping Adds the NonConstBufferDevice table to the FlatBuffer schema (program.fbs) and the corresponding Python dataclass to schema.py. This enables mapping each non-constant planned memory buffer to a specific device type (CPU, CUDA, etc.). The field is optional and absent for CPU-only programs, ensuring zero binary size regression. Differential Revision: [D97335597](https://our.internmc.facebook.com/intern/diff/D97335597/) [ghstack-poisoned]
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…vice mapping (#19500) This PR was created by the merge bot to help merge the original PR into the main branch. ghstack PR number: #19499 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/169/base ghstack PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/169/head Merge bot PR base: https://github.com/pytorch/executorch/tree/main Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/gasoonjia/169/orig Differential Revision: [D97335597](https://our.internmc.facebook.com/intern/diff/D97335597/) @diff-train-skip-merge Co-authored-by: gasoonjia <gasoonjia@icloud.com>
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Stack from ghstack (oldest at bottom):
Adds the NonConstBufferDevice table to the FlatBuffer schema (program.fbs) and the
corresponding Python dataclass to schema.py. This enables mapping each non-constant
planned memory buffer to a specific device type (CPU, CUDA, etc.).
The field is optional and absent for CPU-only programs, ensuring zero binary size regression.
Differential Revision: D97335597