Allow ScalableVectorType to use VectorSize and ElementType properties #128

Job	Run time
windows-arm64 (arm64, release, windows)	1m 21s
windows-x64 (x64, release, windows)	1m 28s
windows-x64 (x64, debug, windows)	1m 23s
windows-arm64 (arm64, debug, windows)	1m 41s
linux-arm64 (arm64, release, ubuntu)	48s
linux-arm64 (arm64, debug, ubuntu)	47s
linux-x64 (x64, debug, ubuntu)	42s
macos-arm64 (arm64, debug, macos)	45s
linux-x64 (x64, release, ubuntu)	47s
macos-arm64 (arm64, release, macos)	48s
sign-nuget	0s
publish-nightlies-github	-1s
publish-nightlies-azure	-1s
	10m 28s

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