Observed that SegmentAllocator:allocateArray(*) methods throws undocumented IllegalArgumentException where the layout alignment is more than their bitsize.

The possible scenario of these methods throwing IAEx is not documented.

For the below case :
 SegmentAllocator.implicitAllocator().allocateArray(ValueLayout.JAVA_BYTE.withBitAlignment(16),new byte[]{1,2,
                3});
will result in - java.lang.IllegalArgumentException: Source layout alignment greater than its size

The spec can be enhanced for this case.