IVGCVSW-847 Fix {NEON/CL}PoolingLayerKernel config

Also, add validation test that hits the discovered failure for CL.

Change-Id: I5573e0a3f169b85d5fb7299e7c48d74be7165208
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/112717
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
4 files changed