Fix wiki-search

[mikasenghaas]

Description

Also uses ToolRubric which got deprecated. Also brings it back into CI so this would've been caught earlier (it takes 40s locally for me the run tests so I think this is better than catching regressions late)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

• All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

---

Note

fix: update wiki_search to use judge-only rubric and re-enable tests

• Removes deprecated ToolRubric/RubricGroup usage; vf.ToolEnv now receives rubric=judge_rubric only in environments/wiki_search/wiki_search.py
• Keeps tool definitions and dataset loading unchanged; no API surface changes to tools
• Re-enables CI coverage by unskipping wiki_search in tests/test_envs.py (it will now run in the slow env tests)

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