Hide TypeInfo and references to it

[steveharter]

Address additional feedback from #53217 (comment):

Have we considered hiding TypeInfo as well?
What about all the other reflection additions we did for Win8, such as

• System.Reflection.AssemblyExtensions
• System.Reflection.CustomAttributeExtensions
• System.Reflection.CustomAttributeExtensions
• System.Reflection.EventInfoExtensions
• System.Reflection.MemberInfoExtensions
• System.Reflection.MethodInfoExtensions
• System.Reflection.ModuleExtensions
• System.Reflection.RuntimeReflectionExtensions
• System.Reflection.TypeExtensions_

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Issue Details

---

Address additional feedback from #53217 (comment):

Have we considered hiding TypeInfo as well?
What about all the other reflection additions we did for Win8, such as

• System.Reflection.AssemblyExtensions
• System.Reflection.CustomAttributeExtensions
• System.Reflection.CustomAttributeExtensions
• System.Reflection.EventInfoExtensions
• System.Reflection.MemberInfoExtensions
• System.Reflection.MethodInfoExtensions
• System.Reflection.ModuleExtensions
• System.Reflection.RuntimeReflectionExtensions
• System.Reflection.TypeExtensions_

Author:	steveharter
Assignees:	-
Labels:	area-System.Reflection
Milestone:	9.0.0

[steveharter]

These classes need the [EditorBrowsable(Never)] applied.