Add MileBench validation for VLMs

[l-bat]

Ticket: 161649

[Copilot]

Pull Request Overview

This PR adds MileBench dataset support and validation for visual-language models (VLMs), integrates new MileBench benchmarks into existing cache eviction tests, and updates fixtures/workflows to handle MileBench data.

• Introduce utils/milebench.py with MileBenchDataset and Eval for data loading and evaluation.
• Extend test_kv_cache_eviction.py to run MileBench benchmarks via parametrized tests.
• Update fixtures (conftest.py) and CI workflows to download/extract MileBench parts and adjust timeouts.

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/python_tests/utils/milebench.py	Added MileBenchDataset and Eval classes for dataset handling and scoring.
tests/python_tests/test_kv_cache_eviction.py	Integrated new MileBench benchmarks into cache eviction tests.
tests/python_tests/conftest.py	Extended TEST_FILES and download_test_content fixture for MileBench archives.
tests/python_tests/samples/conftest.py	Removed obsolete download_test_content imports in sample tests.
.github/workflows/*.{yml}	Increased timeout for Cacheopt E2E CI jobs to accommodate longer tests.

Comments suppressed due to low confidence (2)

tests/python_tests/utils/milebench.py:103

• [nitpick] The class name Eval is very generic and could collide with other utilities; consider renaming it to something more descriptive like MileBenchEvaluator.

class Eval:

tests/python_tests/utils/milebench.py:19

• [nitpick] New MileBenchDataset and Eval utilities lack dedicated unit tests; consider adding tests that verify string transformation, image preprocessing, and choice matching logic.

class MileBenchDataset:

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Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

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Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

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