[dotnet] Copy fewer runtime libraries to the publish directory. (#12059)

* Don't copy runtime dylibs to the publish directory if we're linking statically.
* Don't copy static libraries to the publish directory, they're never needed at
  runtime.

dotnet/targets/Xamarin.Shared.Sdk.targets

@@ -912,6 +912,27 @@
 
 			<!-- Remove the libxamarin-*.dylib files we don't want -->
 			<ResolvedFileToPublish Remove="@(ResolvedFileToPublish)" Condition="'%(Extension)' == '.dylib' And '%(Filename)%(Extension)' != '$(_LibXamarinName)' And $([System.String]::new('%(Filename)').StartsWith('libxamarin-dotnet', StringComparison.Ordinal))" />
+
+			<!-- Remove the runtime dylibs if we're linking the runtime statically -->
+			<ResolvedFileToPublish
+				Remove="@(ResolvedFileToPublish)"
+				Condition=" '$(_LibMonoExtension)' != 'dylib' And
+				            '%(ResolvedFileToPublish.AssetType)' == 'native' And
+				            '%(ResolvedFileToPublish.RuntimeIdentifier)' == '$(RuntimeIdentifier)' And
+				            '%(ResolvedFileToPublish.Extension)' == '.dylib' And
+				            '%(ResolvedFileToPublish.NuGetPackageId)' == '$(_MonoNugetPackageId)'
+				            "
+			/>
+
+			<!-- There's no need to ship .a files -->
+			<ResolvedFileToPublish
+				Remove="@(ResolvedFileToPublish)"
+				Condition=" '%(ResolvedFileToPublish.AssetType)' == 'native' And
+				            '%(ResolvedFileToPublish.RuntimeIdentifier)' == '$(RuntimeIdentifier)' And
+				            '%(ResolvedFileToPublish.Extension)' == '.a' And
+				            '%(ResolvedFileToPublish.NuGetPackageId)' == '$(_MonoNugetPackageId)'
+				            "
+			/>
 		</ItemGroup>
 	</Target>