The ProgrammingError exception is thrown when tables, indexes, or
columns are dropped in parallel. Let's not fail the Antithesis test
drivers when that happens.
Commit 5216e67d ("bindings/python: Start transaction implicitly in
execute()") fixed transaction management in Python bindings, which means
we now need to execute explicit commit().
We also want to just ignore this under Antithesis:
``´
limbo.DatabaseError: Failed to open database: LockingError("Failed locking file. File is locked by another process")
```
If multiple processes access the same database file concurrently, Limbo fails with:
```
LockingError("Failed locking file. File is locked by another process
```
Make test driver robust against that.
