WIP: Vulkan sampling support #136

Job	Run time
build-macos (linux, x64, release)	29s
build-linux (linux, x86)	28s
build-windows (windows, x86, debug, 14.3)	2m 0s
build-android (android, armv7, release, 21)	42s
build-linux (linux, x64)	46s
build-windows (windows, x86, debug, 14.2)	1m 24s
build-android (android, arm64, release, 21)	47s
build-windows (windows, x86, debug, 14.1)	1m 9s
build-windows (windows, x86, release, 14.3)	1m 45s
build-windows (windows, x86, release, 14.2)	1m 25s
build-windows (windows, x86, release, 14.1)	1m 10s
build-windows (windows, x64, debug, 14.3)	1m 36s
build-windows (windows, x64, debug, 14.2)	57s
build-windows (windows, x64, debug, 14.1)	56s
build-windows (windows, x64, release, 14.3)	1m 20s
build-windows (windows, x64, release, 14.2)	1m 30s
build-windows (windows, x64, release, 14.1)	1m 6s
	19m 30s

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