RFR: 8334731: GHA: build on macOS / aarch64

[Kevin Rushforth]

GitHub Actions: add a macOS / aarch64 build using a macOS 14 test runner and a macOS / aarch64 boot JDK. This is a brute force approach that duplicates the job config (I don't want to spend the time to figure out how to parameterize the `.yaml` script).

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Commit messages:
 - 8334731: GHA: build on macOS / aarch64

Changes: https://git.openjdk.org/jfx/pull/1484/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1484&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334731
  Stats: 86 lines in 1 file changed: 86 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1484.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1484/head:pull/1484

PR: https://git.openjdk.org/jfx/pull/1484