Fix path type for pg_class (#8243)

Author: shnikd

ydb/core/sys_view/pg_tables/pg_tables.cpp

@@ -102,7 +102,8 @@ void TPgTablesScanBase::Handle(NSchemeShard::TEvSchemeShard::TEvDescribeSchemeRe
     switch (status) {
         case NKikimrScheme::StatusSuccess: {
             const auto& pathDescription = record.GetPathDescription();
-            Y_ENSURE(pathDescription.GetSelf().GetPathType() == NKikimrSchemeOp::EPathTypeDir);
+            Y_ENSURE(pathDescription.GetSelf().GetPathType() == NKikimrSchemeOp::EPathTypeDir 
+                || pathDescription.GetSelf().GetPathType() == NKikimrSchemeOp::EPathTypeSubDomain);
             break;
         }
         case NKikimrScheme::StatusPathDoesNotExist: