sql: Remove Cockroach extension errors
sql: Remove Cockroach extension errors

Both of the previous errors could be replaced by standard PG errors:
```
RetriableError:CR000            -> SerializationFailureError:40001
TransactionCommittedError:CR001 -> InvalidTransactionStateError:25000
```

vaibhavarora/cockroach,vivekmenezes/cockroach,glycerine/cockroach,vivekmenezes/cockroach,glycerine/cockroach,glycerine/cockroach,sunya123/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,petermattis/cockroach,arjun4084346/cockroach,maxlang/cockroach,veteranlu/cockroach,veteranlu/cockroach,sunya123/cockroach,maxlang/cockroach,veteranlu/cockroach,maxlang/cockroach,vaibhavarora/cockroach,petermattis/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,veteranlu/cockroach,petermattis/cockroach,glycerine/cockroach,sunya123/cockroach,paperstreet/cockroach,arjun4084346/cockroach,paperstreet/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,petermattis/cockroach,vivekmenezes/cockroach,vivekmenezes/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,paperstreet/cockroach,petermattis/cockroach,sunya123/cockroach,sunya123/cockroach,arjun4084346/cockroach,petermattis/cockroach,glycerine/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,veteranlu/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,cockroachdb/cockroach,veteranlu/cockroach,maxlang/cockroach,petermattis/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,sunya123/cockroach,maxlang/cockroach,cockroachdb/cockroach,glycerine/cockroach,maxlang/cockroach,arjun4084346/cockroach,glycerine/cockroach,cockroachdb/cockroach,sunya123/cockroach,arjun4084346/cockroach,paperstreet/cockroach,petermattis/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,glycerine/cockroach,maxlang/cockroach,paperstreet/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,maxlang/cockroach,paperstreet/cockroach,sunya123/cockroach