This PR introduces a suite of new integration tests for the A4X GKE blueprint including validation of post-deployment functionality. These tests cover critical aspects of A4X cluster operation:

• SMI Job Post-Deploy Test: Verifies the successful execution and behavior of SMI (Scalable Multi-instance) jobs on the deployed GKE cluster.
• NCCL Test: Ensures proper functionality and performance of NCCL (NVIDIA Collective Communications Library) for inter-GPU communication, crucial for high-performance workloads.
• Kueue Configuration Test: Validates the correct setup and operation of Kueue, ensuring proper workload scheduling and resource management within the A4X environment.

These additions improve the robustness of our A4X GKE deployments by providing automated verification of key features and configurations.