The sw::Surface object was the intermediate representation of an
image used between the vk::Image and the Blitter. This cl removes
the need for an intermediate representation by having the Blitter
use the vk::Image directly.

There should be no regression for the clear and blit tests.

Bug b/126883332

Change-Id: Icbc15470e3ad112ed78f4f62d6d82c66e3e37a20
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/25928Tested-by: Alexis Hétu <sugoi@google.com>
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>