MLBEDSW-2420: Improved support for dilated convolution

- Dilation added to SET_KERNEL_STRIDE instruction
- Kernel height/width adjusted for dilation
- Updated padding calculation
- Updated weight compression

Change-Id: I0c8190223e223b039a305aba0f37896ae1de2b80
Signed-off-by: Louis Verhaard <louis.verhaard@arm.com>