fix: resolve issue where TypeError is thrown by SQLConnector cookiecutter implementation due to super() references

[kgpayne]

Closes #967

• [Bug]: TypeError thrown by SQLConnector child class generated by cookie cutter #967

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📚 Documentation preview 📚: https://meltano-sdk--972.org.readthedocs.build/en/972/

[codecov]

Codecov Report

Merging #972 (9e98a97) into main (aab68a1) will increase coverage by 0.59%.
The diff coverage is 90.90%.

@@            Coverage Diff             @@
##             main     #972      +/-   ##
==========================================
+ Coverage   81.18%   81.77%   +0.59%     
==========================================
  Files          36       37       +1     
  Lines        3555     3742     +187     
  Branches      718      746      +28     
==========================================
+ Hits         2886     3060     +174     
- Misses        492      500       +8     
- Partials      177      182       +5     

Impacted Files	Coverage Δ
singer_sdk/io_base.py	76.47% <66.66%> (-1.31%)	⬇️
singer_sdk/mapper_base.py	56.14% <66.66%> (+0.58%)	⬆️
singer_sdk/sinks/sql.py	78.48% <80.00%> (-0.47%)	⬇️
singer_sdk/helpers/_batch.py	90.38% <90.38%> (ø)
singer_sdk/sinks/core.py	80.13% <90.90%> (+1.39%)	⬆️
singer_sdk/streams/core.py	83.25% <92.06%> (+1.87%)	⬆️
singer_sdk/helpers/_singer.py	96.59% <100.00%> (+0.17%)	⬆️
singer_sdk/target_base.py	85.37% <100.00%> (+0.35%)	⬆️
singer_sdk/streams/rest.py	83.87% <0.00%> (+1.29%)	⬆️

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