fix(go/adbc/sqldriver): properly close resources #3731
Merged
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fixes #3728
This was a combination of two issues that are fixed in this PR:
sqldriver.Connectorneeds to implement theio.Closerinterface so thatsql.DB.Closewill call it and callCloseon theadbc.Databaseobject.rows.Closeneeds to also close the associatedstmt. In the case of at least one driver (the duckdb driver in associated issue) not closing thestmtled to the handle to the duckdb database not being dropped despite callingCloseon the database.