radv: Vulkan Video hidden behind PERFTEST flag
Currently, to use the new Vulkan Video extensions, you need to both build with a certain flag and then set RADV_PERFTEST=video_encode,video_decode
at runtime.
I'm shipping an app that uses the extensions, and it's easy to get tripped up and forget to set them, which means nothing works. I've resorted to setting it inside my app before creating the Vulkan instance, which is fine for now, but not ideal.
Nevertheless, I wanted to ask what the criteria are for moving something out from behind those flags. In particular, since there's also an off-by-default build flag, it feels redundant. And while the extensions are new this year, they've been finalized, and the radv support is quite good.