layers: Combine vkCmdSetDiscardRectangleEXT check #10150

Job	Run time
code-format	28s
check_vvl	1m 10s
linux (thread sanitizer, release, robinhood ON )	5m 57s
androidOnLinux	3m 1s
chromium (target_os="linux" target_cpu="x64")	8m 4s
android (arm64-v8a, ON, c++_shared)	7m 56s
chromium (target_os="android" target_cpu="arm64")	12m 11s
linux (address sanitizer, debug, robinhood ON )	34m 36s
Ubuntu Backcompat	7m 21s
android (armeabi-v7a, OFF, c++_static)	1m 49s
linux (address sanitizer, release, robinhood ON )	15m 29s
linux (address sanitizer, release, robinhood OFF )	15m 30s
mingw	1m 41s
windows (amd64)	10m 43s
windows (amd64_x86)	9m 44s
iOS	1m 42s
windowsUpload	0s
androidUpload	0s
linux Upload	0s
	2h 17m 22s

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