Initial Grace-Hopper pilot documentation

[ptheywood]

• Adds 3 grace hopper nodes to the hardware page
• Updates test partition max runtime
• Adds 3 grace hopper nodes to the hardware page
• Updates test partition max runtime
• Initial Grace-Hopper pilot usage documentation, including
  • Partition names and max durations
  • General pilot info including how to request access
  • Use of ghlogin
  • Batch job submission example
  • Software avilability caveats

[ptheywood]

Screenshots below to avoid the local render.

• [x] lshw reports 575GB of memory, but think there is actually 480GB of lpddr5x + 96GB of HBM3? (as currently documented)
• [x] ghlogin defualt time needs clarrification (1 hour in sinfo, but is the comamnd actually defualt to 8)
• [x] Is the infiniband info correct?
• [x] Preferred option if any of specifying a differnt number of cpu cores for ghlogin, --cpus-per-task works but generates a warning.

Hardware page

Usage page