Revert "Switch to native functional collective by default (#120370)"
This reverts commit 1f1bc0e6acc3613339b1001a7c9fcd1dfe7b6580.
Reverted https://github.com/pytorch/pytorch/pull/120370 on behalf of https://github.com/yifuwang due to broke CI ([comment](https://github.com/pytorch/pytorch/pull/120370#issuecomment-1965362938))
