test: Add (DuckDB) SQL sink tests

[edgarrmondragon]

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📚 Documentation preview 📚: https://meltano-sdk--2548.org.readthedocs.build/en/2548/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.42%. Comparing base (6811b31) to head (2796f08).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2548   +/-   ##
=======================================
  Coverage   89.42%   89.42%           
=======================================
  Files          58       58           
  Lines        4783     4783           
  Branches      933      933           
=======================================
  Hits         4277     4277           
  Misses        353      353           
  Partials      153      153           

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[codspeed-hq]

CodSpeed Performance Report

Merging #2548 will not alter performance

_{Comparing edgarrmondragon/test/add-sql-sink-tests (2796f08) with main (6811b31)}

Summary

✅ 6 untouched benchmarks