Fix asserts and check for base image format support in image.mutable tests

Fix asserts and check for base image format support in image.mutable tests

This adds a check if base image can be created given the format.

It is required for implementations supporting VK_KHR_maintenance2 or 1.1:
if these are supported, the exisiting VkImageView format support does not
cover base image format support.

Additionally, fix malformed asserts and missign case switches in this test.

Components: Vulkan

Affects: dEQP-VK.image.mutable

VK-GL-CTS Issue: 1295, 1294

(cherry picked from commit eaaa3979b015e2a923b3250b4269d3c9d21137cc)

Change-Id: I7a4afbb624d73aadca4f9a6edf955b3cdc2d863e