Fix default nothrow behavior for MethodIL.GetObject (#50539)

Author: jkotas

src/coreclr/tools/Common/TypeSystem/Common/ResolutionFailure.cs

@@ -84,7 +84,7 @@ public static ResolutionFailure GetAssemblyResolutionFailure(string simpleName)
 
         public void Throw()
         {
-            switch(_failureType)
+            switch (_failureType)
             {
                 case FailureType.TypeLoadException1:
                     ThrowHelper.ThrowTypeLoadException(_name, _module);

src/coreclr/tools/Common/TypeSystem/IL/MethodIL.cs

@@ -86,7 +86,7 @@ public abstract partial class MethodIL
         /// (typically a <see cref="MethodDesc"/>, <see cref="FieldDesc"/>, <see cref="TypeDesc"/>,
         /// or <see cref="MethodSignature"/>).
         /// </summary>
-        public abstract Object GetObject(int token, NotFoundBehavior notFoundBehavior = NotFoundBehavior.ReturnNull);
+        public abstract Object GetObject(int token, NotFoundBehavior notFoundBehavior = NotFoundBehavior.Throw);
 
         /// <summary>
         /// Gets a list of exception regions this method body defines.