Release Go-Live: Binary Build Matrix

Updates tools/scripts/generate_binary_build_matrix.py and the associated test fixtures when a PyTorch release goes live. This mirrors prior PRs such as:

• Release 2.10 go live. Update release matrix (#7668)
• Release 2.11 promotion script changes (#7868)
• Release 2.12 go live. Update release matrix (#8070)

When to use this skill

Use when the user asks to:

• Advance stable version to X.Y.0 in the binary build matrix
• Promote release CUDA/ROCm arches now that release X.Y is going live
• Update generate_binary_build_matrix.py for a new PyTorch release
• Do "release go live" changes

Target files