fix: bugs in rating test with ai evaluator

[bjwswang]

What type of PR is this?

/kind bug

What this PR does / why we need it

Which issue(s) this PR fixes

Fixes #330

Special notes for your reviewer

To enable rating tests with AI evaluator, I created a new environment Dev(configured as manuall approval required) in our github actions and created a secret LLM_API_KEY. the rating-test workflow utliize Dev environment and read LLM_API_KEY as the environment variables.

When user made a pull request, this rating-test requires manually approval from reviewers. See below for more details:

1. wating for approval
2. review pending deployments

[codecov[bot]]

Codecov Report

Merging #331 (4e6243c) into main (74b09d3) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #331   +/-   ##
=======================================
  Coverage   24.42%   24.42%           
=======================================
  Files          37       37           
  Lines        3529     3529           
=======================================
  Hits          862      862           
  Misses       2609     2609           
  Partials       58       58           

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