TOSA: Added decomposition of PAD

Added support for:
-Rank > 4 and batch > 1
-Tensor dimensions exceeding NPU limit
-Padding in any dimension

(Implementation for functional compliance,
 not considering performance)

Signed-off-by: Patrik Gustavsson <patrik.gustavsson@arm.com>
Change-Id: Ief58fb3233d885f10ba5e68c5374b190efbe9351