[release/1.8] Fix performance of CUDA trilinear interpolate backward

[xwang233]

See #52351

[facebook-github-bot]

💊 CI failures summary and remediations

As of commit 104c0c8 (more details on the Dr. CI page):

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• 2/2 failures possibly* introduced in this PR
  • 1/2 non-scanned failure(s)

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🕵️ 1 new failure recognized by patterns

The following CI failures do not appear to be due to upstream breakages:

pytorch_cpp_doc_build (1/1)

Step: "Doc Build and Push" (full log | diagnosis details | 🔁 rerun)

Feb 23 04:16:54 ./.circleci/scripts/cpp_doc_push_script.sh: line 71: pushd: cppdocs: No such file or directory

Feb 23 04:16:44 The HTML pages are in build/html.
Feb 23 04:16:54 ~/workspace ~/workspace
Feb 23 04:16:54 
Feb 23 04:16:54 real	68m34.953s
Feb 23 04:16:54 user	171m37.095s
Feb 23 04:16:54 sys	2m11.574s
Feb 23 04:16:54 ++ popd
Feb 23 04:16:54 ++ popd
Feb 23 04:16:54 ++ pushd cppdocs
Feb 23 04:16:54 ~/workspace
Feb 23 04:16:54 ./.circleci/scripts/cpp_doc_push_script.sh: line 71: pushd: cppdocs: No such file or directory


Exited with code exit status 1

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ci.pytorch.org: 1 failed

• Failed: pr/pytorch-linux-bionic-rocm4.0.1-py3.6

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