This is a conceptually cool trick that just doesn't seem to be worth
it, compared to the old approach of copy + blend-in-shader. I haven't
found any game that benefits more than absolutely minimally, and having
two paths to test isn't great, when the win is so small.
So I'm disabling it. I'm keeping the code for now, but might clear it
out later.
Fixes#17069
Saves about 0.75MB of VRAM, but mainly just to clean things up.
I think I meant to use this one instead of grabbing the one from
DrawEngine in the TextureCache.
And thus change of depth buffer scale/offset.
Previously, old depth buffers with values that now are out of range
could stick around, causing #16941. This clears them to the expected 0
value, which helps Outrun. Ideally we should convert depth buffers to
the new format, but if we can get away without that, that's also nice.
This is enough for #16941.
Extracted from #16759 and bugfixed. Fixes a leak of Vulkan pipelines.
I guess another way would be to queue the variants for destruction at
the same time as we queue the callback, but I like this better.
