vulkan: pick the surface format with the highest depth

Rather than the first compatible surface format. No idea if this makes sense, but it's definitely something we can do.

We might also want to assign a score based on the actual transfer function being used.

added enhancement help wanted vulkan labels

Needs testing. All the platforms I have access to only specify one particular surface format, so this doesn't represent a change in behavior. Care needs to be taken on platforms with compositors (macOS, Windows, etc.)

added 21 commits

• a24c7dda...3b528417 - 20 commits from branch master
• ad72fc6f - vulkan: improve surface format selection logic

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enabled an automatic merge when the pipeline for ad72fc6f succeeds

Looking at the surface formats defined by implementations in the vulkan gpuinfo database, it definitely does seem to be the case that some platforms have both unorm10 and float16, and in this case, we most likely want to prefer unorm10. While rewriting this logic to use a score rather than just looking at the depth, I decided to also add in support for prioritizing HDR over SDR.

merged