Refactor tests in test_responsibleai_dashboard_input.py to have common success and failure criteria

[gaugup]

Description

It seems lot of these were repeated assert patterns. Refactored the success and failure criteria into a separate base class to use it across multiple tests later.

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 #1591 (fe6d576) into main (ce77a5d) will decrease coverage by 0.67%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1591      +/-   ##
==========================================
- Coverage   89.63%   88.95%   -0.68%     
==========================================
  Files          99      109      +10     
  Lines        5121     5379     +258     
==========================================
+ Hits         4590     4785     +195     
- Misses        531      594      +63     

Flag	Coverage Δ
unittests	88.95% <ø> (-0.68%)	⬇️

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Impacted Files	Coverage Δ
rai_core_flask/rai_core_flask/__init__.py	100.00% <0.00%> (ø)
...re_flask/environments/local_ipython_environment.py	88.88% <0.00%> (ø)
...core_flask/rai_core_flask/environments/__init__.py	100.00% <0.00%> (ø)
..._core_flask/rai_core_flask/environment_detector.py	53.33% <0.00%> (ø)
rai_core_flask/rai_core_flask/flask_helper.py	92.30% <0.00%> (ø)
...i_core_flask/environments/public_vm_environment.py	88.88% <0.00%> (ø)
...ai_core_flask/environments/azure_nb_environment.py	73.52% <0.00%> (ø)
..._flask/environments/credentialed_vm_environment.py	100.00% <0.00%> (ø)
...sk/rai_core_flask/environments/base_environment.py	57.14% <0.00%> (ø)
..._core_flask/environments/databricks_environment.py	56.25% <0.00%> (ø)

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/gaugup/RefactorTestCriteriaTests/dashboard/index.html

[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/gaugup/RefactorTestCriteriaTests/dashboard/index.html