add batchsize and arch to imageClassification SweepableTrainer

[LittleLittleCloud]

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related issue:
dotnet/machinelearning-modelbuilder#2526

[codecov]

Codecov Report

Merging #6597 (0fc2d86) into main (f5776b0) will decrease coverage by 0.05%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6597      +/-   ##
==========================================
- Coverage   68.43%   68.38%   -0.05%     
==========================================
  Files        1176     1176              
  Lines      248210   248210              
  Branches    25915    25915              
==========================================
- Hits       169866   169750     -116     
- Misses      71587    71683      +96     
- Partials     6757     6777      +20     

Flag	Coverage Δ
Debug	68.38% <ø> (-0.05%)	⬇️
production	62.76% <ø> (-0.06%)	⬇️
test	88.87% <ø> (ø)

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see 10 files with indirect coverage changes