Turn on device memory planing as default#20239
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Stack from [ghstack](https://github.com/ezyang/ghstack/tree/0.15.0) (oldest at bottom): * #18788 * __->__ #20214 * #19828 * #19582 * #18760 * #18730 * #18761 This diff turn on the on-device memory planing as default, so that every delegate which enables on device memory planing will be use that./ Also update cuda backend to remove H2D/D2H copies and extra caches Differential Revision: [D107597774](https://our.internmc.facebook.com/intern/diff/D107597774/)
Gasoonjia
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manuelcandales
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20239
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recreate the PR due to ghexport bot didn't work
diff: D107597774
original: #20214