Add integration test for A3 high-GPU with spot VMs

[simrankaurb]

This PR adds a new integration test to the daily test suite for validating the deployment and functionality of a Slurm cluster on a3-highgpu-8g machine types using spot VMs.

This includes:

• A new Cloud Build configuration (ml-a3-highgpu-onspot-slurm.yaml) to trigger the test.
• A new test definition file (ml-a3-highgpu-onspot-slurm.yml) that defines the blueprint, variables, and post-deployment validation steps.

Submission Checklist

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Please take the following actions before submitting this pull request.

• Fork your PR branch from the Toolkit "develop" branch (not main)
• Test all changes with pre-commit in a local branch #
• Confirm that "make tests" passes all tests
• Add or modify unit tests to cover code changes
• Ensure that unit test coverage remains above 80%
• Update all applicable documentation
• Follow Cluster Toolkit Contribution guidelines #

[gemini-code-assist]

Summary of Changes

Hello @simrankaurb, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request establishes a new daily integration test designed to validate the deployment and operational integrity of Slurm clusters provisioned on A3 high-GPU machine types, specifically leveraging cost-effective spot virtual machines. The test ensures that these specialized, GPU-accelerated environments function correctly within the daily test suite.

Highlights

• New Integration Test: Introduces a daily integration test for Slurm clusters on A3 high-GPU machine types utilizing spot VMs.
• Cloud Build Configuration: Adds "ml-a3-highgpu-onspot-slurm.yaml" to define the build process and environment for the new test.
• Test Definition File: Includes "ml-a3-highgpu-onspot-slurm.yml" to specify the blueprint, variables, and validation steps for the A3 high-GPU spot VM Slurm deployment.

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[gemini-code-assist]

Code Review

This pull request adds a new integration test for a Slurm cluster on a3-highgpu-8g machine types with spot VMs. The changes look good and introduce necessary configurations for the new test case. I've provided a few suggestions to improve the maintainability and clarity of the new YAML configuration files by removing redundancies and minor inconsistencies. My feedback focuses on using variables for repeated values and cleaning up shell command arguments.