test(system): update c8y system test lib to improve retry logging

[reubenmiller]

Proposed changes

Update the robotframework-c8y library (used in system tests), to improve the logging of the "smart retry" feature. This should help improve debugging of tests to show an assertions number of attempts, and the output of each failed attempt.

Example

The following snippet shows the new info log entries showing that Managed Object Should Have Fragment Values assertion was attempted a few times before it passed.

Types of changes

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• [ ] Documentation Update (if none of the other choices apply)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• [x] I have read the CONTRIBUTING doc
• [x] I have signed the CLA (in all commits with git commit -s)
• [ ] I ran cargo fmt as mentioned in CODING_GUIDELINES
• [ ] I used cargo clippy as mentioned in CODING_GUIDELINES
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

Further comments

[github-actions[bot]]

Robot Results

:white_check_mark: Passed	:x: Failed	:next_track_button: Skipped	Total	Pass %	:stopwatch: Duration
452	0	3	452	100	1h10m50.365512s