Add matrix portion and comparison

* Add matrix portion and rectangular region to specify
  a sub-matrix from a full matrix.
* Add matrix comparison and mismatch handler to compare
  two matrices.
  - Support both raw and per-row quantization formats.

Signed-off-by: Viet-Hoa Do <viet-hoa.do@arm.com>

Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Reviewed-by: Felix Johnny Thomasmathibalan <felixjohnny.thomasmathibalan@arm.com>
Approved-by: Jakub Sujak <jakub.sujak@arm.com>