Mark parent step as failed if child step failed with soft check (fix #827)

[sharovd]

Context

• Implementation of feature request #827
• Added sync_steps_statuses() method to synchronise the status for the parent step based on the status of the child steps. This method returns True if at least one nested step has failed — allowing the parent step or the test itself to be marked as failed
• Added test test_pytest_fail_in_nested_step_with_soft_check() to validate the described test scenario
• Here is an example of allure report after the fix:

Checklist

• [x] Sign Allure CLA
• [x] Provide unit tests

[sharovd]

@delatrie, hi! Could you please review this PR? Please let me know if any changes are needed.

[vochicuong18]

Could you please help merge this branch into master? This issue still occurs in allure-pytest version 2.14.3.

[Solo-TT]

用了大佬的方法，我纯搬运工，解决了我的难题，膜拜！ @sharovd 谢谢

[ExplorerOL]

I really need this functionality too! Maintainers, respond, please!

[Solo-TT]

I really need this functionality too! Maintainers, respond, please!

The author has already submitted it. I wonder where you're from？