test: fix HF API flaky live test with tools

[anakin87]

Related Issues

• failing test in main https://github.com/deepset-ai/haystack/actions/runs/12826740828/job/35767504647

Proposed Changes:

• use a more reliable model for the test (it's not easy to find alternatives, because the model should be warm and not gated)
• add the flaky marker to retry the live tests in this test suite if failing (unfortunately, the LM response is cached, so the marker only helps with network issues, etc.)

How did you test it?

CI

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: and added ! in case the PR includes breaking changes.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 12828961994

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 91.302%

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Totals
Change from base Build 12826740828:	0.0%
Covered Lines:	8849
Relevant Lines:	9692

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💛 - Coveralls