[fbgemm_gpu] Update clang version

[q10]

• Update clang version to 16 to silence complaints from libc++

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@q10 has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

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@q10 merged this pull request in pytorch/FBGEMM@949425c5d22abeddf61f966c15b065cbfd6d2a60.