retry_failed_queries=true should not apply to DMLs

[localhost:21050] joetest> insert into retrytest select count(*) from functional.alltypes where bool_col = sleep(50);
Query: insert into retrytest select count(*) from functional.alltypes where bool_col = sleep(50)
Query submitted at: 2021-03-15 10:23:32 (Coordinator: http://joemcdonnell:25000)
Query progress can be monitored at: http://joemcdonnell:25000/query_plan?query_id=5f4b8c0224faa31a:4a585cf700000000
...
Failed due to unreachable impalad(s): joemcdonnell:27002                                                        00000000
Retried query link: http://joemcdonnell:25000/query_plan?query_id=824b6b103ea68ea3:bc804b4Failed due to unreachable impalad(s): joemcdonnell:27002
...
Query has been retried using query id: 824b6b103ea68ea3:bc804b4500000000                  Retried query link: http://joemcdonnell:25000/query_plan?query_id=824b6b103ea68ea3:bc804b4500000000
Modified 1 row(s) in 47.71s