Fix support for pytest-main.

[icemac]

Fixes #323

[Copilot]

Pull request overview

This PR fixes compatibility with pytest mainline (and pytest >= 9) by ensuring rerunfailures properly resets fixture execution state when a fixture setup fails and is retried, preventing pytest’s internal assertion about leftover fixture finalizers.

Changes:

• Clear FixtureDef._finalizers when removing cached results for failed fixtures so reruns can re-execute fixtures cleanly.
• Document the compatibility fix in CHANGES.rst.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/pytest_rerunfailures.py	Clears fixture finalizers during failed-fixture cache cleanup to avoid pytest >= 9 assertion failures on rerun.
CHANGES.rst	Adds an unreleased changelog entry describing the compatibility fix.

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