fix(sdk): Update Report API to work with pydantic2.6

[andrewtruong]

Description

Pydantic 2.6 introduces some changes to dataclasses that caused our old internal attr setting to break. This PR fixes that.

Testing

How was this PR tested?

unit tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d40b2a5) 77.09% compared to head (c3d7742) 79.74%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6925      +/-   ##
==========================================
+ Coverage   77.09%   79.74%   +2.64%     
==========================================
  Files         462      462              
  Lines       52662    52681      +19     
==========================================
+ Hits        40602    42011    +1409     
+ Misses      11765    10375    -1390     
  Partials      295      295              

Flag	Coverage Δ
func	48.74% <0.00%> (-0.04%)	⬇️
system	62.04% <0.00%> (+0.03%)	⬆️
unit	59.44% <100.00%> (+2.67%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
wandb/apis/reports/v2/interface.py	79.81% <100.00%> (+79.81%)	⬆️

... and 12 files with indirect coverage changes