Add support for TypeConverter

Fixes: #8493
Fixes: #9632
Fixes: #9339
Fixes: #8385
Fixes: 10077

This fix adds support for type converters as well as a few other minor
things we were missing from binding. The key thing about supporting
conversions is that we new can support arbitrary types with `@bind`.
This means you can use it with generics, which is something many users
have tried.

Along with type converters we get Guid and TimeSpan from the BCL. The
BCL also includes converters for types we're less interested in like
`short`.

Author: Ryan Nowak

src/Components/Blazor/Build/src/targets/BuiltInBclLinkerDescriptor.xml

@@ -13,5 +13,9 @@
   <assembly fullname="System">
     <!-- Without this, [Required(typeof(bool), "true", "true", ErrorMessage = "...")] fails -->
     <type fullname="System.ComponentModel.BooleanConverter" />
+
+    <!-- TypeConverters are only used through reflection. These are two built-in TypeConverters that are useful. -->
+    <type fullname="System.ComponentModel.GuidConverter" />
+    <type fullname="System.ComponentModel.TimeSpanConverter" />
   </assembly>
 </linker>