ROPE computing suitable for NPU

[leisuzz]

What does this PR do?

In this way, the computing time cost for NPU will reduce about 3%-5%.

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[leisuzz]

@sayakpaul Please take a look at this PR, thank you!

[sayakpaul]

Personally, I think it kinda complicates the codebase a bit. But since it's an internal module, it's probably fine. @yiyixuxu WDYT?