Add min and max batch size args to Modelhandler used in example

[AnandInguva]

Follow up on #25370

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[codecov]

Codecov Report

Merging #25395 (fec6e75) into master (9fcb3a5) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #25395   +/-   ##
=======================================
  Coverage   72.91%   72.92%           
=======================================
  Files         746      746           
  Lines       99267    99264    -3     
=======================================
+ Hits        72380    72384    +4     
+ Misses      25522    25515    -7     
  Partials     1365     1365           

Flag	Coverage Δ
python	82.39% <ø> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
...examples/inference/pytorch_image_classification.py	0.00% <ø> (ø)
...hon/apache_beam/runners/worker/bundle_processor.py	93.61% <0.00%> (+0.12%)	⬆️
...ks/python/apache_beam/runners/worker/sdk_worker.py	89.24% <0.00%> (+0.16%)	⬆️
...python/apache_beam/runners/worker/worker_status.py	75.33% <0.00%> (+0.66%)	⬆️
.../apache_beam/runners/interactive/dataproc/types.py	96.55% <0.00%> (+3.44%)	⬆️

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[damccorm]

Thanks!