Add copy image to image and blit image tests with various image layouts. Refactor...

Add copy image to image and blit image tests with various image layouts. Refactor copy and blit tests generation.

Tests took into account only optimal layout cases. Added general and mixed ones.
Structure of all copy and blit tests was too flat. Lowered granularity of test groups.

New tests:
- dEQP-VK.api.copy_and_blit.image_to_image.all_formats.*optimal_optimal*
- dEQP-VK.api.copy_and_blit.image_to_image.all_formats.*optimal_general*
- dEQP-VK.api.copy_and_blit.image_to_image.all_formats.*general_optimal*
- dEQP-VK.api.copy_and_blit.image_to_image.all_formats.*general_general*

- dEQP-VK.api.copy_and_blit.blit_image.all_formats.*optimal_optimal*
- dEQP-VK.api.copy_and_blit.blit_image.all_formats.*optimal_general*
- dEQP-VK.api.copy_and_blit.blit_image.all_formats.*general_optimal*
- dEQP-VK.api.copy_and_blit.blit_image.all_formats.*general_general*

Affected tests:
- dEQP-VK.api.copy_and_blit.*

Components: Vulkan

Change-Id: I5724bb7c0a3ccb2e36319a20671761a9b16fe4ed