`[Obsolete]` Types Are Not Flagged

[JasonBock]

To reproduce:

var code =
	"""
	using Rocks;
	using System;
	using System.Collections;
	using System.Collections.Generic;
	using System.Linq;
									
	#nullable enable

	namespace MockTests
	{
		[Obsolete("Do not use this", true)]
		public interface IServerComponent
		{
			void Execute();
		}

		public abstract class JobStorage
		{
			public virtual IEnumerable<IServerComponent> GetComponents() =>
				Enumerable.Empty<IServerComponent>();
		}

		public static class Test
		{
			public static void Generate()
			{
				var rock = Rock.Create<JobStorage>();
			}
		}
	}
	""";

This will produce errors like this:

error CS0619: 'IServerComponent' is obsolete: 'Do not use this'

We need to consider if the type itself is considered obsolete from the different member parts. Note that we're already checking the target type for a mock to see if it's obsolete.

This was found on Hangfire.JobStorage.