Added support for image regions and buffer rowLength/imageHeight
for Image to Buffer copies or Buffer to Image copies.

Passes all tests in:
dEQP-VK.api.copy_and_blit.core.image_to_buffer
dEQP-VK.api.copy_and_blit.core.buffer_to_image

Bug b/119620767

Change-Id: I2b2592c06d52609c3f9c51fa164a0335f58f361f
Reviewed-on: https://swiftshader-review.googlesource.com/c/23228Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>