add radio button tests for RAI text dashboard

[imatiach-msft]

Description

This PR is a follow-up to #1636 and #1642 to add tests to the RAI dashboard for text scenario. In this PR, we add tests for the radio buttons in the RAI dashboard, which should be the last remaining part of the new UI that needs UI test coverage.

RAITextTestsVideo.mp4

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 #1648 (7df362f) into main (7930cc4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1648   +/-   ##
=======================================
  Coverage   89.00%   89.00%           
=======================================
  Files         105      105           
  Lines        5529     5529           
=======================================
  Hits         4921     4921           
  Misses        608      608           

Flag	Coverage Δ
unittests	89.00% <ø> (ø)

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/ilmat/text-ui-testsv3/dashboard/index.html