[validation]: TestSqlIngestErrors asserts sqlstate but some databases does not return sqlstate

[Mandukhai-Alimaa]

In TestSqlIngestErrors, the validation suite asserts that a specific SQLSTATE (42S02) must be returned when appending to a non-existent table. But some databases do not return a 5-character SQLSTATE. This is causing the test to fail even though the driver correctly identifies the error and returns a non-OK status.

https://github.com/adbc-drivers/driverbase-go/blob/main/validation/validation.go#L1302