ByteBufferCleaner to check Unsafe access in Java 23+

[maxxedev]

In Java 23+, ByteBufferCleaner should check for access to deprecated memory-access methods in sun.misc.Unsafe

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[garydgregory]

Converting to draft until I can have a closer look, needs clean ups anyway.

[garydgregory]

There are several problems here:

• The build fails
• Using java.lang.management adds a new module dependency which some people will complain about. We could disallow this through Checkstyle but we currently do not.
• It's not clear to me this is the correct implementation since the JEP is just a deprecation.
• There is a bug where clearWritable() is not called.

[maxxedev]

build fails

fixed

* Using `java.lang.management` adds a new module dependency which some people will complain about. We could disallow this through Checkstyle but we currently do not.

we just disable Unsafe access on Java 23+ now

* It's not clear to me this is the correct implementation since the JEP is just a deprecation.

deprecation is for removal. Plus, most users would want the library to not trigger scary warnings.

* There is a bug where `clearWritable()` is not called.

fixed