test/qtest/hace: Specify explicit array sizes for test vectors and hash results

test/qtest/hace: Specify explicit array sizes for test vectors and hash results

To enhance code readability and prevent potential buffer overflows or unintended
size assumptions, this commit updates all fixed-size array declarations to use
explicit array sizes.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Acked-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/qemu-devel/20250515081008.583578-20-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>