Clean up CUDA Sleep and Tensor Initialization in ProcessGroupNCCLTest (#42211)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42211
Helper functions for launching CUDA Sleep and Tensor Value Initialization for the collective test functions.
This is more of a code cleanup fix compared to the previous diffs.
ghstack-source-id: 109097243
Test Plan: working on devGPU and devvm
Reviewed By: jiayisuse
Differential Revision: D22782671
fbshipit-source-id: 7d88f568a4e08feae778669affe69c8d638973db
