mashumaro < 3.15

[MichelleArk]

Manual backport of #11046 to fix scheduled builds

Example failed run: https://github.com/dbt-labs/dbt-core/actions/runs/12120919455

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.66%. Comparing base (a6165ba) to head (7f330ae).
Report is 1 commits behind head on 1.7.latest.

Additional details and impacted files

@@              Coverage Diff               @@
##           1.7.latest   #11086      +/-   ##
==============================================
- Coverage       86.71%   86.66%   -0.05%     
==============================================
  Files             179      179              
  Lines           26728    26728              
==============================================
- Hits            23177    23165      -12     
- Misses           3551     3563      +12     

Flag	Coverage Δ
integration	83.48% <ø> (-0.12%)	⬇️
unit	65.12% <ø> (ø)

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