[fix](table-function) Fix bug of table function with outer join cause nullptr of tuple (#9041)

regression-test/data/table_function/explode_json_array.out

@@ -65,6 +65,20 @@
 400	Dan	50	4	Street 4	22.214	b
 400	Dan	50	4	Street 4	214.1	b
 
+-- !outer_join_explode_json_array --
+\N	\N	1
+\N	\N	3
+\N	\N	b
+\N	30	1
+\N	30	3
+\N	30	b
+\N	50	1
+\N	50	3
+\N	50	b
+\N	80	1
+\N	80	3
+\N	80	b
+
 -- !explode_json_array --
 true