RFR: 8350118: Simplify the layout access VarHandle [v5]

[Chen Liang]

On Fri, 28 Feb 2025 10:21:27 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> Maybe something like `isOffsetFixed` or `hasFixedOffset` would be better?
>
> (I suggested renaming to something that didn't contain the term "offset" -- it's a subjective thing and if I'm in the minority that's ok. Maybe `noIndex`, or `noVariableOffset` ?)

I have already used constantOffset and find it better than noStride in terms of clarity.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23720#discussion_r1975413935