Migrate Go code to C# for gRPC interceptors

[toma3233]

Related to #9

This pull request updates the Azure/aks-middleware repository by replacing all Go code with C# implementations, specifically focusing on gRPC interceptors to leverage C# capabilities.

• Deletes Go files: Removes all existing Go files related to gRPC interceptors, including autologger.go, ctxlogger.go, interceptor.go, and several others, to make way for C# implementations.
• Adds C# files: Introduces new C# files that replicate the functionality of the deleted Go files. This includes autologger.cs, ctxlogger.cs, interceptor.cs, and others, each implementing the equivalent functionality in C#.
• Implements gRPC Interceptors in C#: Each added C# file serves a specific purpose within the gRPC interceptor framework, such as logging, error handling, metadata forwarding, retry policies, and request ID generation, fully transitioning the middleware to utilize C# features.

---

For more details, open the Copilot Workspace session.