RFR: 8360936: Test compiler/onSpinWait/TestOnSpinWaitAArch64.java fails after JDK-8359435

[Evgeny Astigeevich]

Test compiler/onSpinWait/TestOnSpinWaitAArch64.java needs debug info to identify a position of spin wait instructions in generated code. Release builds might not generate needed debug info.

This PR adds a requirement for the test to be run on debug builds only.

Tested:
- Fastdebug: test passed
- Slowdebug: test passed.
- Release: test skipped.

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Commit messages:
 - 8360936: Test compiler/onSpinWait/TestOnSpinWaitAArch64.java fails after JDK-8359435

Changes: https://git.openjdk.org/jdk/pull/26072/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26072&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8360936
  Stats: 3 lines in 2 files changed: 1 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26072.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26072/head:pull/26072

PR: https://git.openjdk.org/jdk/pull/26072