Update base for Update on "[Gradient Compression] Allow BatchedPowerS…

…GD to run vanilla allreduce for the first K iterations"

Similar to #50973, allow the batched version to run vanilla allreduce for the first K iterations.

This may be useful if the batched version can be applied to some use cases where the accuracy requirement is not very strict.

Original PR issue: Investigate Applying PowerSGD to Communication Hook for Gradient Compression #47202

Differential Revision: [D26077709](https://our.internmc.facebook.com/intern/diff/D26077709/)

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