test: end2end evaluation tests

[davidsbatista]

Related Issues

• fixes #5336

Proposed Changes:

• Adding end2end tests over an evaluation pipeline

Notes for the reviewer

I've opted for:

• 3 questions and 4 documents
• simple basic RAG pipelines x2 (for the detailed comparative scores)
• the evaluation pipeline has all the current evaluators except for LLMEvaluator and AnswerExactMatchEvaluator

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 8849494576

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 90.096%

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Totals
Change from base Build 8849262940:	0.0%
Covered Lines:	6313
Relevant Lines:	7007

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💛 - Coveralls

[shadeMe]

LGTM! Can we also invoke the E2E tests in the CI to make sure that they work?