[lworld+vector] RFR: Merge lworld

[Jatin Bhateja]

On Sun, 25 Jun 2023 06:52:27 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

> After payload element type for `VectorShuffle` is changed from `byte` to the same type with vector, following payload classes and the related codes in hotspot are never used and can be removed:
> 
> ```
> VectorPayloadMF8B
> VectorPayloadMF16B
> VectorPayloadMF32B
> ```

I have submitted a patch on mainline to backout shuffle related changes citing performance issues JDK-8310459. So these classes may be needed in next mainline merge.

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PR Comment: https://git.openjdk.org/valhalla/pull/866#issuecomment-1607178195