RFR: 8329997: Add MemorySegment::reinterpretate overloads for alignment constraints

[Maurizio Cimadamore]

On Wed, 10 Apr 2024 12:49:11 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes to add two overloads `MemorySegment::reinterpretate` to allow aligned reinterpretation.

Should we add the full set of overloads? E.g.
reinterpret(arena, cleanup)
reinterpret(size)
reinterpret(size, arena, cleanup)
reinterpret(size, align) // this is missing
reinterpret(size, align, arena, cleanup)  // this is missing
reinterpret(layout)
reinterpret(layout, arena, cleanup)

In other places (e.g. `asSlice`) we accept size/align where we also accept a layout

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PR Comment: https://git.openjdk.org/jdk/pull/18717#issuecomment-2047856585