RFR: 8349653: Clarify the docs for MemorySegment::reinterpret

[Per Minborg]

On Wed, 19 Feb 2025 13:35:16 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> This PR proposes to clarify the documentation for two of the `MemorySegment::reinterpret` overloads.
>
> Marked as reviewed by jvernee (Reviewer).

Thanks for the review @JornVernee! I am going to let this PR sit for an extra day in case there is additional feedback, before integrating.

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PR Comment: https://git.openjdk.org/jdk/pull/23688#issuecomment-2668823935