feat: Add SASEvaluator

[silvanocerza]

Related Issues

• fixes Implement function to calculate Semantic Answer Similarity metric #6069

Proposed Changes:

Add a SASEvaluator Component to calculate Semantic Answer Similarity.

How did you test it?

Added unit and integration tests.

Notes for the reviewer

The logic is identical to the SASEvaluator added in #6980 and refactored with in #6998.

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 8541962462

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.
• 46 unchanged lines in 6 files lost coverage.
• Overall coverage decreased (-0.2%) to 89.331%

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Files with Coverage Reduction	New Missed Lines	%
components/embedders/hugging_face_tei_document_embedder.py	1	98.48%
components/embedders/hugging_face_tei_text_embedder.py	1	97.73%
components/websearch/searchapi.py	2	96.36%
core/pipeline/pipeline.py	4	93.85%
components/embedders/azure_text_embedder.py	12	65.12%
components/embedders/azure_document_embedder.py	26	52.24%

Totals
Change from base Build 8439010873:	-0.2%
Covered Lines:	5618
Relevant Lines:	6289

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💛 - Coveralls