GLAS | Update CSharp (and other languages) supported versions

GLAS currently only supports C# 10.0 (released November 2021), while three newer versions exist - with C# 13.0 being the latest (November 2024). This outdated support is causing critical issues for customers using modern C# codebases.

Problem

• Compatibility Issues: GLAS crashes when analyzing code written in C# versions 11.0-13.0
• Performance Degradation: When not crashing, scans of newer C# codebases experience timeout errors and excessive scan durations
• Customer Impact: Organizations using modern C# development practices cannot effectively utilize our SAST capabilities

Impact

• Customers using newer C# versions cannot benefit from our advanced SAST analysis
• Potential customer churn as they seek alternative security solutions

Proposed Solution

Update GLAS to support the latest C# versions (11.0, 12.0, and 13.0), ensuring compatibility with modern C# codebases.

Business Value

• Unblock customers currently unable to use our SAST capabilities
• Improve scan performance and reliability for C# codebases
• Demonstrate GitLab's commitment to supporting modern development practices