Router query with true=false in LEFT JOIN errors out

**Schema**
```
CREATE TABLE test_src (id int, tenant_id int);
CREATE TABLE test_src_1 (id int, tenant_id int);
SELECT create_distributed_table('test_src','tenant_id');
SELECT create_distributed_table('test_src_1','tenant_id');
```
**Query that errors out.**
```
SELECT ts1.tenant_id,count(*) FROM test_src ts1 LEFT JOIN test_src ts2
ON true=false AND ts1.tenant_id = ts2.tenant_id WHERE ts1.tenant_id = 1
group by ts1.tenant_id;
```
**Query that works:**
```
SELECT ts1.tenant_id,count(*) FROM test_src ts1 LEFT JOIN test_src ts2
ON false=false AND ts1.tenant_id = ts2.tenant_id WHERE ts1.tenant_id = 1
group by ts1.tenant_id;
```