RFR: 8353735: [JVMCI] Allow specifying storage kind of the callee save register [v3]

[Doug Simon]

On Thu, 8 May 2025 14:54:36 GMT, Yudi Zheng <yzheng at openjdk.org> wrote:

>> Windows x64 ABI considers the upper portions of YMM0-YMM15 and ZMM0-ZMM15 volatile, that is, destroyed on function calls. This PR allows `RegisterConfig` implementations to refine the storage kind of callee save register, such that JVMCI compiler can exploit this information to avoid saving full width of these registers.
>
> Yudi Zheng has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update javadoc

Still good.

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Marked as reviewed by dnsimon (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24451#pullrequestreview-2825424244