Fixes #108964 [Mono] ves_icall_RuntimeType_GetInterfaces generates add extra Implemented Interface (#113721)

* #108964 [Mono] ves_icall_RuntimeType_GetInterfaces generates an extra Implemented Interface

* Added the regression test

---------

Signed-off-by: Medha Tiwari <medhavns1@gmail.com>

Author: medhatiwari

src/libraries/System.Runtime/tests/System.Reflection.Tests/TypeInfoTests.cs

@@ -940,6 +940,7 @@ public void GetMembers(BindingFlags bindingAttributes, int length)
         [Theory]
         [InlineData(typeof(MembersClass), new Type[] { typeof(TI_NonGenericInterface1), typeof(TI_NonGenericInterface2) })]
         [InlineData(typeof(TI_NonGenericInterface2), new Type[0])]
+        [InlineData(typeof(IntEnum), new Type[] { typeof(IComparable), typeof(ISpanFormattable), typeof(IFormattable), typeof(IConvertible) })]
         public void GetInterfaces(Type type, Type[] expected)
         {
             Assert.Equal(expected.OrderBy(t => t.Name), type.GetTypeInfo().GetInterfaces().OrderBy(t => t.Name));

src/mono/mono/metadata/class-init.c

@@ -3964,21 +3964,15 @@ mono_class_setup_interfaces (MonoClass *klass, MonoError *error)
 			if (iface)
 				array_ifaces [interface_count ++] = iface;
 		}
-		int mult = klass->element_class->enumtype ? 2 : 1;
 
-		interfaces = (MonoClass **)mono_image_alloc0 (klass->image, sizeof (MonoClass*) * interface_count * mult);
+		interfaces = (MonoClass **)mono_image_alloc0 (klass->image, sizeof (MonoClass*) * interface_count );
 
 		int itf_idx = 0;
 		args [0] = m_class_get_byval_arg (m_class_get_element_class (klass));
 		for (int i = 0; i < interface_count; ++i)
 			interfaces [itf_idx++] = mono_class_bind_generic_parameters (array_ifaces [i], 1, args, FALSE);
-		if (klass->element_class->enumtype) {
-			args [0] = mono_class_enum_basetype_internal (klass->element_class);
-			for (int i = 0; i < interface_count; ++i)
-				interfaces [itf_idx++] = mono_class_bind_generic_parameters (array_ifaces [i], 1, args, FALSE);
-		}
-		interface_count *= mult;
 		g_assert (itf_idx == interface_count);
+
 	} else if (mono_class_is_ginst (klass)) {
 		MonoClass *gklass = mono_class_get_generic_class (klass)->container_class;