fix flaky test test_rai_insights_add_save_load_save on dataset fetch

[imatiach-msft]

Description

The test test_rai_insights_add_save_load_save is flaky has been erroring including on the build:

https://github.com/microsoft/responsible-ai-toolbox/actions/runs/3087387703/jobs/4992705136

The underlying error was a networking issue:

>           raise FileNotFoundError(f"{path} not found.")
E           FileNotFoundError: https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.data not found.

Adding simple retry logic around it via raiutils retry_function method makes the test more reliable.

Checklist

• I have added screenshots above for all UI changes.
• I have added e2e tests for all UI changes.
• Documentation was updated if it was needed.

[codecov-commenter]

Codecov Report

Merging #1734 (27bec0a) into main (c86bfff) will increase coverage by 10.04%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main    #1734       +/-   ##
===========================================
+ Coverage   78.95%   88.99%   +10.04%     
===========================================
  Files          19      105       +86     
  Lines        1321     5589     +4268     
===========================================
+ Hits         1043     4974     +3931     
- Misses        278      615      +337     

Flag	Coverage Δ
unittests	88.99% <ø> (+10.04%)	⬆️

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

Impacted Files	Coverage Δ
...ranalysis/erroranalysis/_internal/cohort_filter.py	87.17% <0.00%> (ø)
raiutils/raiutils/dataset/__init__.py	100.00% <0.00%> (ø)
...i/responsibleai/managers/error_analysis_manager.py	88.88% <0.00%> (ø)
...ai_core_flask/environments/azure_nb_environment.py	73.52% <0.00%> (ø)
...sponsibleai/responsibleai/managers/base_manager.py	95.23% <0.00%> (ø)
...nsibleai/databalanceanalysis/data_balance_utils.py	100.00% <0.00%> (ø)
...bleai/responsibleai/_tools/causal/causal_result.py	97.05% <0.00%> (ø)
erroranalysis/erroranalysis/report/error_report.py	94.04% <0.00%> (ø)
...sponsibleai/responsibleai/rai_insights/__init__.py	100.00% <0.00%> (ø)
...nalysis/erroranalysis/_internal/version_checker.py	50.00% <0.00%> (ø)
... and 76 more

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