Add getting-started parameter to generate getting started matrix

[atalman]

Test I see correctly generated matrix:

{"include": [{"python_version": "3.9", "gpu_arch_type": "cpu", "gpu_arch_version": "", "desired_cuda": "cpu", "container_image": "pytorch/manylinux2_28-builder:cpu", "package_type": "manywheel", "build_name": "manywheel-py3_9-cpu", "validation_runner": "linux.2xlarge", "installation": "pip3 install torch torchvision --index-url https://download.pytorch.org/whl/cpu", "channel": "release", "upload_to_base_bucket": "no", "stable_version": "2.7.1", "use_split_build": false}, {"python_version": "3.9", "gpu_arch_type": "cuda", "gpu_arch_version": "11.8", "desired_cuda": "cu118", "container_image": "pytorch/manylinux2_28-builder:cuda11.8", "package_type": "manywheel", "build_name": "manywheel-py3_9-cuda11_8", "validation_runner": "linux.g5.4xlarge.nvidia.gpu", "installation": "pip3 install torch torchvision --index-url https://download.pytorch.org/whl/cu118", "channel": "release", "upload_to_base_bucket": "no", "stable_version": "2.7.1", "use_split_build": false}, {"python_version": "3.9", "gpu_arch_type": "cuda", "gpu_arch_version": "12.6", "desired_cuda": "cu126", "container_image": "pytorch/manylinux2_28-builder:cuda12.6", "package_type": "manywheel", "build_name": "manywheel-py3_9-cuda12_6", "validation_runner": "linux.g5.4xlarge.nvidia.gpu", "installation": "pip3 install torch torchvision", "channel": "release", "upload_to_base_bucket": "no", "stable_version": "2.7.1", "use_split_build": false}, {"python_version": "3.9", "gpu_arch_type": "cuda", "gpu_arch_version": "12.8", "desired_cuda": "cu128", "container_image": "pytorch/manylinux2_28-builder:cuda12.8", "package_type": "manywheel", "build_name": "manywheel-py3_9-cuda12_8", "validation_runner": "linux.g5.4xlarge.nvidia.gpu", "installation": "pip3 install torch torchvision --index-url https://download.pytorch.org/whl/cu128", "channel": "release", "upload_to_base_bucket": "no", "stable_version": "2.7.1", "use_split_build": false}, {"python_version": "3.9", "gpu_arch_type": "rocm", "gpu_arch_version": "6.2.4", "desired_cuda": "rocm6.2.4", "container_image": "pytorch/manylinux2_28-builder:rocm6.2.4", "package_type": "manywheel", "build_name": "manywheel-py3_9-rocm6_2_4", "validation_runner": "linux.2xlarge", "installation": "pip3 install torch torchvision --index-url https://download.pytorch.org/whl/rocm6.2.4", "channel": "release", "upload_to_base_bucket": "no", "stable_version": "2.7.1", "use_split_build": false}, {"python_version": "3.9", "gpu_arch_type": "rocm", "gpu_arch_version": "6.3", "desired_cuda": "rocm6.3", "container_image": "pytorch/manylinux2_28-builder:rocm6.3", "package_type": "manywheel", "build_name": "manywheel-py3_9-rocm6_3", "validation_runner": "linux.2xlarge", "installation": "pip3 install torch torchvision --index-url https://download.pytorch.org/whl/rocm6.3", "channel": "release", "upload_to_base_bucket": "no", "stable_version": "2.7.1", "use_split_build": false}]}

[netlify]

✅ Deploy Preview for pytorch-dot-org-preview ready!

Name	Link
🔨 Latest commit	ae0dcb6
🔍 Latest deploy log	https://app.netlify.com/projects/pytorch-dot-org-preview/deploys/68938bc12c4d5c000870b467
😎 Deploy Preview	https://deploy-preview-2032--pytorch-dot-org-preview.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.