ci: switch to jakoch/install-vulkan-sdk-action@v1 for Vulkan SDK + SwiftShader.

[eddyb]

Updating the Vulkan SDK we used in CI came up in:

• Erase explicit layout decorations (Offset/ArrayStride) when disallowed by Vulkan. #379 (comment)

Sadly, the NcStudios/VulkanCI@v1.2 action we were using to get SwiftShader on Windows, is stuck on an older version, and doesn't appear to be prompt to update in general.

So this PR replaces humbletim/install-vulkan-sdk@v1.2 + NcStudios/VulkanCI@v1.2 with jakoch/install-vulkan-sdk-action@v1, which supports SwiftShader (or Lavapipe, but I kept it on SwiftShader) for Windows (AFAICT that action downloads SwiftShader/Lavapipe releases from jakoch/rasterizers, separately from the Vulkan SDK).

From what I could tell, the jakoch/install-vulkan-sdk-action repo has a lot more recent activity than the others we were using, and its approach feels more robust long-term (at least in terms of bumping Vulkan SDK versions).

[Firestar99]

Seems quite dead to me: NcStudios/VulkanCI#11

I was going to mention that the repo only has 10 stars, but NcStudios has 27 and humbletim has 55. It seems all github actions have a very low star rating.

[eddyb]

That's really weird, merge queue failed in the same way having no SwiftShader used to fail, but it clearly works in PR CI, and I can definitely see the failing run having executed:

echo"C:/Swiftshader/">>"$GITHUB_PATH"echo"VK_DRIVER_FILES=C:/Swiftshader/vk_swiftshader_icd.json">>"$GITHUB_ENV"

(which is needed to actually use SwiftShader - NcStudios/VulkanCI@v1.2 was doing that automatically, but for jakoch/install-vulkan-sdk-action@v1 I had to do it manually)

Anyway, it worked in PR CI, so I am going to retry it, hoping I am not making CI non-deterministic in the process.