MDEV-30341 Reset check_foreigns, check_unique_secondary variables

- InnoDB fails to reset the check_foreigns and check_unique_secondary
in trx_t::free(), trx_t::commit_cleanup(). This lead to bulk insert
in internal innodb fts table operation.

storage/innobase/include/trx0trx.h

@@ -1070,6 +1070,8 @@ struct trx_t : ilist_node<>
     ut_ad(!dict_operation);
     ut_ad(!apply_online_log);
     ut_ad(!is_not_inheriting_locks());
+    ut_ad(check_foreigns);
+    ut_ad(check_unique_secondary);
   }
 
   /** This has to be invoked on SAVEPOINT or at the end of a statement.

storage/innobase/trx/trx0trx.cc

@@ -385,9 +385,10 @@ void trx_t::free()
 
   dict_operation= false;
   trx_sys.deregister_trx(this);
+  check_unique_secondary= true;
+  check_foreigns= true;
   assert_freed();
   trx_sys.rw_trx_hash.put_pins(this);
-
   mysql_thd= nullptr;
 
   // FIXME: We need to avoid this heap free/alloc for each commit.
@@ -1378,6 +1379,8 @@ void trx_t::commit_cleanup()
   state= TRX_STATE_NOT_STARTED;
   mod_tables.clear();
 
+  check_foreigns= true;
+  check_unique_secondary= true;
   assert_freed();
   trx_init(this);
   mutex.wr_unlock();