Default DynamicCodeSupport to true for CoreCLR (#103594)

Fixes #80398

Author: sbomer

src/coreclr/tools/aot/crossgen2/crossgen2_publish.csproj

@@ -53,6 +53,9 @@
     <!-- Use .dwarf files instead of .dsym files since our symbol exporting may not safely handle folders. -->
     <NativeSymbolExt Condition="'$(_IsApplePlatform)' == 'true'">.dwarf</NativeSymbolExt>
     <DsymUtilOptions Condition="'$(_IsApplePlatform)' == 'true'">--flat</DsymUtilOptions>
+    <!-- Prevent getting DynamicCodeSupport=true default from ILLink targets that are imported
+         with the Sdk.targets import above, before Native AOT defaults get a chance to set it -->
+    <DynamicCodeSupport>false</DynamicCodeSupport>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(NativeAotSupported)' == 'true'">

src/tools/illink/src/ILLink.Tasks/build/Microsoft.NET.ILLink.targets

@@ -55,6 +55,7 @@ Copyright (c) .NET Foundation. All rights reserved.
     <_ComObjectDescriptorSupport Condition="'$(_ComObjectDescriptorSupport)' == ''">false</_ComObjectDescriptorSupport>
     <_DesignerHostSupport Condition="'$(_DesignerHostSupport)' == ''">false</_DesignerHostSupport>
     <_DefaultValueAttributeSupport Condition="'$(_DefaultValueAttributeSupport)' == ''">false</_DefaultValueAttributeSupport>
+    <DynamicCodeSupport Condition="'$(DynamicCodeSupport)' == ''">true</DynamicCodeSupport>
     <UseSystemResourceKeys Condition="'$(UseSystemResourceKeys)' == ''">false</UseSystemResourceKeys>
   </PropertyGroup>