RFR: 8250269: Replace ATTRIBUTE_ALIGNED with alignas [v16]

[Kim Barrett]

On Thu, 8 Jun 2023 07:44:08 GMT, Julian Waters <jwaters at openjdk.org> wrote:

> Anyone? There's confirmation that no other cases of the macro is in a position that causes issues without compiler errors...

I plan to look at this again soon-ish, but swamped right now.

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PR Comment: https://git.openjdk.org/jdk/pull/11431#issuecomment-1583156443