Add tests for resolving between images of different sizes

Add tests for resolving between images of different sizes

New tests: dEQP-VK.api.copy_and_blit.resolve_image.diff_image_size*

This change adds new tests, which try to resolve data between images of
different sizes. As some implementations may optimize resolves of whole
images, this tests tricks implementation by having resolve region equal
one of dst/src image size, while the other image is larger.

`FILL_MODE_MULTISAMPLE` logic was tweaked to work properly on non-square src images
- this is required by new tests.

Change-Id: If15f500e0e4b2b574f1441da71e5d57e690f8f43