Change to use worst Test Step result as the Test Case result

[brasmusson]

Description

Change to use worst Test Step result as the Test Case result

When calculating the Test Case result Cucumber-Ruby-Core should conform with the GetWorstTestCaseResult function used in the Messages module.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds new behaviour)

Please add an entry to the relevant section of CHANGELOG.md as part of this pull request.

Note to other contributors

If your change may impact future contributors, explain it here, and remember to update README.md and CONTRIBUTING.md accordingly.

Checklist:

Your PR is ready for review once the following checklist is
complete. You can also add some checks if you want to.

• Tests have been added for any changes to behaviour of the code
• New and existing tests are passing locally and on CI
• bundle exec rubocop reports no offenses
• CHANGELOG.md has been updated

[luke-hill]

Haven't got round to fully reviewing but we have this concept in messages
https://github.com/cucumber/messages/blob/main/ruby/lib/cucumber/messages/helpers/test_step_result_comparator.rb