RFR: 8369140: GHA: Update macOS / x64 build to use macos-15-intel runner

Fri Oct 3 22:56:01 UTC 2025

On Fri, 3 Oct 2025 21:46:05 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> I see that the GHA build on Linux failed with a known intermittent test failure that is unrelated to this change (which only touches macOS / x64 GHA builds).

I reran the failing Linux job and it passed.

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PR Comment: https://git.openjdk.org/jfx/pull/1928#issuecomment-3367462487