Misleading cartesian products error on repartition queries

On a repartition query, if data types of the equality don't match, we error out with an unrelated error message.

```sql
CREATE TABLE testA (id int, valueInt int, valueBigint bigint);
CREATE TABLE testB (id int, valueInt int, valueBigint bigint);

SELECT create_distributed_table('testA', 'id');
SELECT create_distributed_table('testB', 'id');

SELECT count(*) FROM testA, testB WHERE testA.id = testB.valueBigint;
```

```sql
ERROR: cannot perform distributed planning on this query
DETAIL: Cartesian products are currently unsupported
```