[jdk25] RFR: 8360776: Disable Intel APX by default and enable it with -XX:+UnlockExperimentalVMOptions -XX:+UseAPX in all builds

Fri Jul 11 19:05:51 UTC 2025

Hi all,

This pull request contains a backport of commit [26b00280](https://github.com/openjdk/jdk/commit/26b002805ab235d07998eddd486fe66a69f60671) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Srinivas Vamsi Parasa on 11 Jul 2025 and was reviewed by Sandhya Viswanathan, David Holmes and Jatin Bhateja.

This PR **got approval** for the late enhancement feature request. 

Thanks!

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Commit messages:
 - Backport 26b002805ab235d07998eddd486fe66a69f60671

Changes: https://git.openjdk.org/jdk/pull/26274/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26274&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8360776
  Stats: 16 lines in 4 files changed: 0 ins; 16 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26274.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26274/head:pull/26274

PR: https://git.openjdk.org/jdk/pull/26274