Use default beam avro version

[RustedBones]

Go with the flow and use default beam avro version.

Continue running tests on legacy avro 1.8.2

[codecov]

Codecov Report

Attention: Patch coverage is 76.19048% with 5 lines in your changes missing coverage. Please review.

Project coverage is 61.06%. Comparing base (c4d4554) to head (3a36b09).
Report is 2 commits behind head on main.

Files	Patch %	Lines
...a/com/spotify/scio/extra/bigquery/ToTableRow.scala	76.19%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5415      +/-   ##
==========================================
- Coverage   61.24%   61.06%   -0.18%     
==========================================
  Files         310      310              
  Lines       11058    11060       +2     
  Branches      751      769      +18     
==========================================
- Hits         6772     6754      -18     
- Misses       4286     4306      +20     

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