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Upgrade NCCL to 2.4.8.1 #23016

@mfuntowicz

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@mfuntowicz

Would it be possible to bump NCCL version to 2.4.8.1 as it fixes a regression (suboptimal performances) when communicating over sockets in multi-nodes distributed setting.

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    module: ncclProblems related to nccl supportoncall: distributedAdd this issue/PR to distributed oncall triage queuetriagedThis issue has been looked at a team member, and triaged and prioritized into an appropriate module

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