fix failing RAI Insights test due to change in EA _string_ind_data type

[imatiach-msft]

Description

Fix failing RAI Insights test due to change in EA _string_ind_data type.
_string_ind_data used to be inconsistently either list or numpy array which was fixed in recent PR #1617 , however the test in RAIInsights test_rai_insights.py file is incorrectly validating the type is list.
This test started failing in gated build after the release of erroranalysis 0.3.9 to pypi.

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 #1658 (32c11fd) into main (fa41718) will decrease coverage by 3.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1658      +/-   ##
==========================================
- Coverage   89.00%   85.61%   -3.39%     
==========================================
  Files         105       58      -47     
  Lines        5529     3017    -2512     
==========================================
- Hits         4921     2583    -2338     
+ Misses        608      434     -174     

Flag	Coverage Δ
unittests	85.61% <ø> (-3.39%)	⬇️

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Impacted Files	Coverage Δ
...ai/responsibleai/_tools/error_analysis/__init__.py
responsibleai/responsibleai/_tools/__init__.py
.../responsibleai/modelanalysis/constants/__init__.py
...ponsibleai/responsibleai/_tools/shared/versions.py
...ponsibleai/responsibleai/modelanalysis/__init__.py
responsibleai/responsibleai/__version__.py
.../databalanceanalysis/aggregate_balance_measures.py
...ibleai/_tools/shared/state_directory_management.py
...sponsibleai/responsibleai/rai_insights/__init__.py
...tabalanceanalysis/distribution_balance_measures.py
... and 37 more

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