Port ps_roi_pool (CUDA) to stable ABI.

[adabeyta]

Notes

• Determinism layer change follows Port roi_align (CUDA) to stable ABI. #9573/Port roi_pool (CUDA) to stable ABI. #9582.

Stable-ABI audit (torch-abi-audit)

Ran torch-abi-audit. ps_roi_pool's CUDA op moves into the fully-STABLE _C_stable.so (unstable=0) and pulls in no new shim symbols. The unstable _C.so count is unchanged asince the kernel's unstable references are shared with the remaining unstable ops.

    Package: torchvision
      Torch ABI:   UNSTABLE
      CPython ABI: n/a
      Bundled libs: 3
      -- bundled libs --
        [UNSTABLE] [not-abi3] _C.so            (stable_shim=0,  unstable=85)
        [STABLE  ] [not-abi3] _C_stable.so     (stable_shim=74, unstable=0)
        [STABLE  ] [not-abi3] image_stable.so  (stable_shim=78, unstable=0)

[pytorch-bot]

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[NicolasHug]

Thanks !