[Testing] Implement Automated Testing Framework for MAPT

Description:
MAPT currently lacks automated testing coverage, which poses a risk to the stability and reliability of the codebase. Implementing a robust testing framework is essential to:

• Detect bugs early in the development cycle.
• Validate configuration decisions without creating real infrastructure.
• Ensure allocation logic works correctly across different scenarios.
• Maintain code quality and prevent regressions.

Proposed solution:
Implement a comprehensive testing framework using Ginkgo and Gomega. The framework will follow a mock-first approach, providing

• Complete AWS service mocking (EC2, SSM, IAM, Pricing)
• No real infrastructure creation during tests
• Realistic test data simulating actual AWS services

Initial Test Coverage:
The initial focus will be on creating tests for the AWS Single Node Cluster (SNC) provisioning logic, which will serve as the foundation for future test coverage. This phase will cover:

• SNC creation with spot instances across multiple regions.
• Multi-architecture support (ARM64, x86_64).
• Spot price optimization and allocation logic.
• Configuration validation (AMI selection, networking, storage).
• Error handling and edge case scenarios.
• Fallback mechanisms (spot to on-demand).

Next Steps

Please review this proposal and provide feedback. Once the approach is approved, I will begin the implementation of the framework and the initial test coverage outlined above.