Fix IsNonBundledAssemblyLoadingSupported condition in PlatformDetection (#73235)

Inadvertently put in a condition that only made tests with this check run in NativeAOT. The intent was to skip on both NativeAOT and Mono AOT.

Author: steveisok

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs

@@ -153,7 +153,7 @@ private static bool GetLinqExpressionsBuiltWithIsInterpretingOnly()
         public static bool IsNotIntMaxValueArrayIndexSupported => s_largeArrayIsNotSupported.Value;
 
         public static bool IsAssemblyLoadingSupported => !IsNativeAot;
-        public static bool IsNonBundledAssemblyLoadingSupported => !IsAssemblyLoadingSupported && !IsMonoAOT;
+        public static bool IsNonBundledAssemblyLoadingSupported => IsAssemblyLoadingSupported && !IsMonoAOT;
         public static bool IsMethodBodySupported => !IsNativeAot;
         public static bool IsDebuggerTypeProxyAttributeSupported => !IsNativeAot;
         public static bool HasAssemblyFiles => !string.IsNullOrEmpty(typeof(PlatformDetection).Assembly.Location);

src/libraries/System.Runtime.Extensions/tests/System/AppDomainTests.cs

@@ -259,6 +259,8 @@ public void ExecuteAssemblyByName()
             }).Dispose();
         }
 
+        // In Mono AOT, loading assemblies can happen, but they need to be AOT'd and registered on startup.  That is not the case
+        // with TestAppOutsideOfTPA.exe
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNonBundledAssemblyLoadingSupported))]
         public void ExecuteAssembly()
         {