[mono] Emit instances for EnumComparer<T> into the mscorlib aot image, so the (#51180)

gsharedvt version is not used.

Fixes https://github.com/dotnet/runtime/issues/51113.

src/mono/mono/mini/aot-compiler.c

@@ -5794,6 +5794,8 @@ add_generic_instances (MonoAotCompile *acfg)
 			}
 			enum_comparer = mono_class_load_from_name (mono_defaults.corlib, "System.Collections.Generic", "EnumEqualityComparer`1");
 			add_instances_of (acfg, enum_comparer, insts, ninsts, TRUE);
+			enum_comparer = mono_class_load_from_name (mono_defaults.corlib, "System.Collections.Generic", "EnumComparer`1");
+			add_instances_of (acfg, enum_comparer, insts, ninsts, TRUE);
 		}
 
 		/* Add instances of the array generic interfaces for primitive types */