Investigate whether we can set ILC/ILLinker feature flags using RuntimeHostConfigurationOption

[rolfbjarne]

Ref: #17374 (comment)

Look into whether we can change this:

<PropertyGroup>
	<!-- Set the features for ILLink -->
	<_ExtraTrimmerArgs>$(_ExtraTrimmerArgs) --feature ObjCRuntime.Runtime.Arch.IsSimulator $(_IsSimulatorFeature)</_ExtraTrimmerArgs>
	<_ExtraTrimmerArgs>$(_ExtraTrimmerArgs) --feature ObjCRuntime.Runtime.IsManagedStaticRegistrar $(_IsManagedStaticRegistrarFeature)</_ExtraTrimmerArgs>
	<_ExtraTrimmerArgs>$(_ExtraTrimmerArgs) --feature ObjCRuntime.Runtime.IsNativeAOT $(_IsNativeAOTFeature)</_ExtraTrimmerArgs>
</PropertyGroup>

<ItemGroup>
	<!-- Set the features for ILC -->
	<IlcArg Include="--feature:ObjCRuntime.Runtime.Arch.IsSimulator=$(_IsSimulatorFeature)" />
	<IlcArg Include="--feature:ObjCRuntime.Runtime.IsManagedStaticRegistrar=$(_IsManagedStaticRegistrarFeature)" />
	<IlcArg Include="--feature:ObjCRuntime.Runtime.IsNativeAOT=$(_IsNativeAOTFeature)" />
</ItemGroup>

from here: f39d80b (#17374)

to using RuntimeHostConfigurationOption items:

https://github.com/dotnet/sdk/blob/20b2949041a3cb8ab5f4a4c030ed280540b94e4f/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.targets#L485-L488

and that should hopefully work for both ILC and ILLinker.

[ivanpovazan]

Fixed with fa06001