Accelerate code reviews with GitLab Duo and Amazon Q

Introduces the integration of GitLab Duo with Amazon Q Service for agentic AI-powered code reviews. Users can trigger reviews via the '/q review' command in merge requests. Amazon Q Service analyzes code changes for bugs, readability, syntax, and coding standards, providing actionable feedback and suggestions for fixes. This feature aims to accelerate code reviews, improve code quality, and reduce deployment times.