Updating the FunctionalTests to clearly explain why they are not strong named signed. (#3010)

Author: eerhardt

test/Microsoft.ML.Functional.Tests/Microsoft.ML.Functional.Tests.csproj

@@ -1,8 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <!-- We are turning off strong naming to ensure we never add `InternalsVisibleTo` for these tests -->
-    <SignAssembly>true</SignAssembly>
+    <!-- DON'T CHANGE THIS!!! We are turning off strong naming to ensure we never add `InternalsVisibleTo` for these tests -->
+    <SignAssembly>false</SignAssembly>
+    <!-- DON'T CHANGE THIS!!! We are turning off strong naming to ensure we never add `InternalsVisibleTo` for these tests -->
     <PublicSign>false</PublicSign>
   </PropertyGroup>