Support Thread.onSpinWait

[aoli-al]

Do we want to support Thread.onSpinWait? This operation allows the thread to block a bit until a signal is received. In most cases, this operation is used as an optimization and will always fallback to a timed operation later.

Here is an example: https://github.com/corretto/corretto-21/blob/f96d2d8b681a14c5ce0b89d719fd5b2deda4249a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java#L435

Is there any case Fray will introduce a false positive if we do not support this operation?