BVT

Add CxPlatAsync to simplify creating threads with cxplat #140

Job	Run time
Build MacOs (Debug, macos, macos-12, x64) / Build	27s
Build MacOs (Release, macos, macos-12, x64) / Build	32s
Build Ubuntu (Debug, linux, ubuntu-20.04, x64) / Build	2m 24s
Build Ubuntu (Debug, linux, ubuntu-22.04, x64) / Build	1m 30s
Build Ubuntu (Release, linux, ubuntu-20.04, x64) / Build	2m 4s
Build Ubuntu (Release, linux, ubuntu-22.04, x64) / Build	1m 31s
Build WinUser (Debug, windows, windows-2022, x64) / Build	2m 6s
Build WinUser (Release, windows, windows-2022, x64) / Build	56s
Build WinKernel (Debug, winkernel, windows-2022, x64) / Build	39s
Build WinKernel (Release, winkernel, windows-2022, x64) / Build	1m 25s
BVT Kernel (Debug, winkernel, windows-2022, x64)	21s
BVT Kernel (Release, winkernel, windows-2022, x64)	22s
BVT (Debug, linux, ubuntu-20.04, x64)	45s
BVT (Release, linux, ubuntu-20.04, x64)	47s
BVT (Debug, linux, ubuntu-22.04, x64)	32s
BVT (Release, linux, ubuntu-22.04, x64)	49s
BVT (Debug, windows, windows-2019, x64)	15s
BVT (Release, windows, windows-2019, x64)	17s
BVT (Debug, windows, windows-2022, x64)	23s
BVT (Release, windows, windows-2022, x64)	25s
BVT (Debug, macos, macos-12, x64)	11s
BVT (Release, macos, macos-12, x64)	10s
Complete	1s
	18m 52s

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