Add engine_name to CQ Violations Response
What does this MR do and why?
Adds engine_name to the CodeQuality GraphQL and JSON response. This request is used to populate the CodeQuality widget on the MR overview page
Relevant issue: #386417 (closed)
Screenshots or screen recordings
How to set up and validate locally
- Enable Code Quality for a repo
- Create a patch and open an MR. Make sure there are some intentional flaws that CQ can find.
- Confirm the response of the codequality_reports.jsonrequest
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR. 
