[StaticRuntime] Replace StorageImpl with TensorImpl in MemoryPlanner (#56447)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56447
MemoryPlanner shouldn't manage StorageImpls; instead, it should manage the TensorImpls because the StorageImpl in Tensors can change.
Test Plan: CI
Reviewed By: ajyu
Differential Revision: D27840361
fbshipit-source-id: f22165d167c70165be2934c6717b5057a8bb4d29
