1.3.229 SDK makes non-backward-compatible change to SwapchainKHR::getImages()

[azonenberg]

The 1.3.224 and older SDK returns a std::vector<VkImage>.

6fe966c changes this to return a std::vector<vk::Image>. While vk::Image is directly convertible to VkImage, vector<vk::Image> and vector<VkImage> are not directly convertible.

As a result, existing code which assigns the value of getImages() to a variable of type vector<VkImage> will no longer compile with the .229 SDK, and changing the type will make it require .229 and not compile with .224 or older. This doesn't seem like the kind of API change that should have been made in a minor version.

I'm not sure what the best course of action is now that there's been an official SDK release containing this change, but I wanted to get it out there.