8K levels: Tensor op tests kernel/stride at 8192 maximums

Operators updated: AVG_POOL2D, MAX_POOL2D, CONV2D, CONV3D,
 DEPTHWISE_CONV2D & TRANSPOSE_CONV2D
tosa_verif_build_tests argument --level-8k-sizes used to
allow kernel/stride maximum boundary testing

Fixed bugs in height/width validator function meaning some
esixting avg_pool2d float tests need regening.

Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: I7aeab82d3bd3c49d02d54708f2c9d995cd3cf2df