Add test for IComponent typeconverter register in TypeDescriptor (dot…

…net/corefx#40959)

Commit migrated from dotnet/corefx@d1eeba9

src/libraries/System.ComponentModel.TypeConverter/tests/TypeDescriptorTests.netcoreapp.cs

@@ -10,6 +10,7 @@ public partial class TypeDescriptorTests
     {
         [Theory]
         [InlineData(typeof(Version), typeof(VersionConverter))]
+        [InlineData(typeof(IComponent), typeof(ComponentConverter))]
         public static void GetConverter_NetCoreApp(Type targetType, Type resultConverterType) =>
             GetConverter(targetType, resultConverterType);
     }