Don't require `--driver` or `--profile` when driver can be inferred from `--uri` scheme

[ianmcook]

When the user specifies --uri foo://, that implies that they want the driver named foo, so we don't have to require --driver.

[ianmcook]

For reference, see how Kent implemented this same thing in the JS bindings, which wraps the same Rust ADBC library that Databow wraps: apache/arrow-adbc#4537