Track data-diff usage in MotherDuck

[sungchun12]

Add data-diff usage tracking to motherduck to understand usage trends and open up partnership opportunities.

Logic Changes

• Updated the duckdb connection to conditionally add the data-diff version to the custom user agent if duckdb version >= 0.9.2
• Updated duckdb dependency to be the latest major version for testing
• Updated github actions to include a motherduck api token tied to my Datafold user within the motherduck platform: sung@datafold.com

Testing

• Added a motherduck integration with a motherduck-specific profile
• Replicated the same assertions to the existing basic dbt test
• Upgraded jaffle_shop.duckdb to work with the latest duckdb version 0.9.2 and replicates the same results before this PR. It was using 0.7.1 that was causing errors when interfacing with motherduck.