Add SGLang and TRT-LLM configs for GreenNode runners

[aistackdev]

We only run vLLM today. Add SGLang and TRT-LLM equivalents so we can compare engines.

Hardware

• 1× H100, 2× H100, 1× RTX 5090

Configs to add (in .github/configs/nvidia-master.yaml)

• gptoss-fp4-h100-1x-sglang
• dsr1qwen3-bf16-rtx5090-1x-sglang
• dsr1qwen3-fp8-rtx5090-1x-sglang
• TRT-LLM variants (check Blackwell consumer support first for 5090)

Each needs: config block + benchmark script + framework-appropriate image.