Update CMake to handle ARM64EC with VS Generator (#493) #20

Job	Run time
build (windows-2019, x64-Debug, amd64)	3m 4s
build (windows-2019, x64-Release, amd64)	3m 4s
build (windows-2019, x64-Debug-Clang, amd64)	3m 25s
build (windows-2019, x64-Release-Clang, amd64)	3m 42s
build (windows-2022, x64-Debug, amd64)	2m 5s
build (windows-2022, x64-Release, amd64)	2m 56s
build (windows-2022, x64-Debug-Clang, amd64)	2m 22s
build (windows-2022, x64-Release-Clang, amd64)	3m 1s
build (windows-2019, x86-Debug, amd64_x86)	2m 2s
build (windows-2019, x86-Release, amd64_x86)	2m 39s
build (windows-2019, x86-Debug-Clang, amd64_x86)	2m 18s
build (windows-2019, x86-Release-Clang, amd64_x86)	2m 37s
build (windows-2022, x86-Debug, amd64_x86)	2m 17s
build (windows-2022, x86-Release, amd64_x86)	2m 45s
build (windows-2022, x86-Debug-Clang, amd64_x86)	2m 58s
build (windows-2022, x86-Release-Clang, amd64_x86)	3m 17s
build (windows-2022, arm64-Debug, amd64_arm64)	2m 32s
build (windows-2022, arm64-Release, amd64_arm64)	2m 41s
build (windows-2022, arm64ec-Debug, amd64_arm64)	2m 33s
build (windows-2022, arm64ec-Release, amd64_arm64)	2m 49s
	55m 7s

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