Introduce failed jobs in MRs widget and troubleshooting
What does this MR do and why?
Cleans up the ci_job_failures_in_mr feature flag. Introduces section to quickly troubleshoot failed jobs of a pipeline on an MR.
Flag has been fully enabled on .com since 12/03/2024 9:57am EST and internally tested since 16.1.
References
Please include cross links to any resources that are relevant to this MR. This will give reviewers and future readers helpful context to give an efficient review of the changes introduced.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Screenshots or screen recordings
How to set up and validate locally
- Visit an MR with a pipeline and failed jobs
- Ensure feature is visible and working
- Ensure FF cleanup is good 👍 
Related to #414321 (closed)
Edited  by Payton Burdette
