[AOT] Add RequiresDynamicCode annotation to Microsoft.AspNetCore.Routing (#45580)

* Add warnings and annotations

* revert PropertyHelper changes

* Revert JSInterop changes

* revert PropertySetter changes

Author: Nick-Stanton

src/Http/Routing/src/Matching/ILEmitTrieFactory.cs

@@ -4,6 +4,7 @@
 #nullable disable
 
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Reflection;
 using System.Reflection.Emit;
@@ -12,6 +13,7 @@
 
 namespace Microsoft.AspNetCore.Routing.Matching;
 
+[RequiresDynamicCode("ILEmitTrieFactory uses runtime IL generation.")]
 internal static class ILEmitTrieFactory
 {
     // The algorthm we use only works for ASCII text. If we find non-ASCII text in the input
@@ -477,6 +479,7 @@ private sealed class Labels
         public Label ReturnNotAscii { get; set; }
     }
 
+    [RequiresDynamicCode("ILEmitTrieFactory uses runtime IL generation.")]
     private sealed class Methods
     {
         // Caching because the methods won't change, if we're being called once we're likely to

src/Http/Routing/src/Matching/ILEmitTrieJumpTable.cs

@@ -3,12 +3,15 @@
 
 #nullable disable
 
+using System.Diagnostics.CodeAnalysis;
+
 namespace Microsoft.AspNetCore.Routing.Matching;
 
 // Uses generated IL to implement the JumpTable contract. This approach requires
 // a fallback jump table for two reasons:
 // 1. We compute the IL lazily to avoid taking up significant time when processing a request
 // 2. The generated IL only supports ASCII in the URL path
+[RequiresDynamicCode("ILEmitTrieJumpTable uses runtime IL generation.")]
 internal sealed class ILEmitTrieJumpTable : JumpTable
 {
     private readonly int _defaultDestination;

src/Http/Routing/src/Matching/JumpTableBuilder.cs

@@ -87,7 +87,9 @@ public static JumpTable Build(int defaultDestination, int exitDestination, (stri
         // Use the ILEmitTrieJumpTable if the IL is going to be compiled (not interpreted)
         if (RuntimeFeature.IsDynamicCodeCompiled)
         {
+#pragma warning disable IL3050 // See https://github.com/dotnet/linker/issues/2715.
             return new ILEmitTrieJumpTable(defaultDestination, exitDestination, pathEntries, vectorize: null, fallback);
+#pragma warning restore IL3050 
         }
 
         return fallback;