Add evals to the test matrix

[Kludex]

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commit:	97958cf
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[DouweM]

@Kludex Cross-posting here from Slack:

looks like the pydantic-evals job skips all tests in test/evals: https://github.com/pydantic/pydantic-ai/actions/runs/16942085788/job/48013554639

tests/evals/test_evaluator_base.py ssssssss                                                                                                    [  7%]
tests/evals/test_evaluator_context.py ss                                                                                                       [  9%]
tests/evals/test_evaluator_spec.py sssss                                                                                                       [ 13%]
tests/evals/test_llm_as_a_judge.py sssssssssss                                                                                                 [ 23%]
tests/evals/test_render_numbers.py ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss                                                [ 78%]
tests/evals/test_reporting.py ssssss                                                                                                           [ 83%]
tests/evals/test_reports.py sssssss                                                                                                            [ 90%]
tests/evals/test_utils.py sssssssssss                                                                                                          [100%]

══════════════════════════════════════════════════════════════════ inline-snapshot ═══════════════════════════════════════════════════════════════════
INFO: inline-snapshot was disabled because you used xdist


Results (3.84s):
       114 skipped

I'm also not sure we should have pytest.importorskip('logfire') anywhere except tests that specifically test logfire