Update SambaNova Docs

[simspartacz]

Update from SN30 to SN40L
https://www.alcf.anl.gov/alcf-ai-testbed
https://docs.alcf.anl.gov/ai-testbed/sambanova/

[github-actions]

This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[github-actions]

This issue was closed because it has been stalled for 5 days with no activity.

[felker]

there is SN40L documentation wholly contained in a subsection/dropdown menu, but it should be more integrated into other pages e.g. https://docs.alcf.anl.gov/ai-testbed/

❯ grep -nri "sn40l"
services/inference-endpoints.md:122:| **[SambaNova SN40L (Metis)](https://docs.alcf.anl.gov/ai-testbed/sn40l_inference/)** | Active | SambaNova API | `/resource_server/metis/api/v1` | `/chat/completions` |
ai-testbed/sn40l_inference/using_an_inference_endpoint.md:2:The Sambanova SN40L cluster (Metis) is integrated as part of the ALCF inference service provided through API access to the models running on the Metis cluster.
ai-testbed/sn40l_inference/using_an_inference_endpoint.md:164:Source one of the SN40L endpoint information files to set some environment variables, then copy them to the environment variables expected by the openai python package and the sample scripts below:
ai-testbed/sn40l_inference/index.md:5:SambaStack is a purpose-built hardware and software platform optimized for AI inference, powered by SambaNova’s advanced Reconfigurable Dataflow Unit (RDU) processors. At the core of this infrastructure is a SambaNova SN40L cluster, composed of two SambaRacks—each housing 16 SN40L RDU systems. This dedicated setup delivers high-throughput, low-latency performance for machine learning workloads. Models running on the cluster are exposed through OpenAI-compatible API endpoints, with each endpoint capable of hosting multiple independently accessible models.
ai-testbed/sn40l_inference/index.md:11:RDUs: [Reconfigurable Dataflow Units (RDUs) — purpose-built for AI](https://sambanova.ai/products/sn40l-rdu-ai-chip)

[felker]

@venkat-1 agrees that https://www.alcf.anl.gov/alcf-ai-testbed is now up-to-date, and the above user-guides page is out of date: https://github.com/argonne-lcf/user-guides/blob/main/docs/ai-testbed/index.md (last updated 11 months ago). PR to come

[felker]

Closed by #1121