Remove HSDP validation check (#112435)
Currently, HSDP validates that all intra/inter node PGs are the same. This makes sense if you are only using HSDP with no other forms of parallelism and is a nice but not necessary sanity check.
However, if you want to mix HSDP with other forms, say tensor parallelism on the FFN of a transformer block, the intra/inter node PGs will be different for that layer. This check raises errors in this scenario, so we need to remove this assumption.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/112435
Approved by: https://github.com/wz337, https://github.com/Skylion007
