[AMDGPU][Scheduler] Revert all regions when remat fails to increase occ.#2

lucas-rami wants to merge 1 commit intousers/lucas-rami/spr/main.amdgpuscheduler-revert-all-regions-when-remat-fails-to-increase-occlucas-rami/llvm-project:users/lucas-rami/spr/main.amdgpuscheduler-revert-all-regions-when-remat-fails-to-increase-occfrom

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