RFR: 8350118: Simplify the layout access VarHandle [v2]

[Chen Liang]

On Fri, 21 Feb 2025 18:54:24 GMT, Chen Liang <liach at openjdk.org> wrote:

>> I'm not convinced about the one in ValueLayouts *e.g. where this comment was added) -- if you agree that the other cache should already handle this -- then maybe we can only keep one
>
> Indeed, the other cache already handles this.

Done in latest update.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23720#discussion_r1968136574