Check if org.apache.avro.SERIALIZABLE_CLASSES in scio-smb Parquet writes

[clairemcginty]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.49%. Comparing base (7ab1e05) to head (b5dd126).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5847   +/-   ##
=======================================
  Coverage   61.49%   61.49%           
=======================================
  Files         317      317           
  Lines       11650    11650           
  Branches      845      845           
=======================================
  Hits         7164     7164           
  Misses       4486     4486           

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