Make HostModel use live System.Reflection.Metadata

[ViktorHofer]

Discussed in #109852. We should explore if HostModel can use live SRM.

runtime/src/installer/managed/Microsoft.NET.HostModel/Microsoft.NET.HostModel.csproj

Lines 22 to 23 in d44116e

	<!-- SDK pins this to a lower version https://github.com/dotnet/sdk/issues/43325 -->
	<PackageReference Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataToolsetVersion)" />

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