GPU-enabled runners for ModelOps and HPC workloads in CI/CD

What this post added

Introduces GPU-enabled runners on GitLab.com SaaS for ModelOps and HPC workloads. Details how to use them by tagging jobs and selecting appropriate Docker images with NVIDIA CUDA drivers. Provides examples for basic model training and scientific simulations, as well as an advanced example of building a custom Docker image for model training, including steps for building, testing, and publishing the model. Also mentions using GPU runners for ML-powered GitLab issue triage.