8345127: Add --sun-misc-unsafe-memory-access=allow when running tests until JDK-8334137 is fixed

[kevinrushforth]

Add the --sun-misc-unsafe-memory-access=allow flag until JDK-8334137 is fixed to avoid warnings when running tests (automated and manual) with JDK 24.

I've tested this using a boot JDK of JDK 22.0.2, JDK 23 (the boot JDK we use in production), and in our CI with the latest promoted build of JDK 24, which now warns by default when a deprecated method in sun.misc.Unsafe is called.

Without this fix, we see a warning when running our automated or manual tests with JDK 24. With this fix, we see no warnings.

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Issue

• JDK-8345127: Add --sun-misc-unsafe-memory-access=allow when running tests until JDK-8334137 is fixed (Bug - P3)

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[kevinrushforth]

We really only need to add --sun-misc-unsafe-memory-access=allow when running with JDK 24 or later ("allow" is the default in JDK 23). I want to do initial testing on JDK 23 with this flag, but will likely change all of the checks to jdk24OrLater for the final version, in which case we won't need the jdk23OrLater flag.

[kevinrushforth]

I made the above change.

[mlbridge]

Webrevs

• 00: Full (4e136a0f)