[CI] Broaden stage-b-test-1-gpu-large runner pool to H100 + H200 (#24080)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.github/workflows/pr-test.yml

@@ -820,7 +820,10 @@ jobs:
           ((needs.check-changes.outputs.main_package == 'true') || (needs.check-changes.outputs.sgl_kernel == 'true'))
         )
       )
-    runs-on: 1-gpu-h100
+    # `1-gpu-h100-h200` is a shared label advertised by both the 1-GPU H100 and
+    # 1-GPU H200 runner pools, so this job can land on either. Multimodal_gen
+    # jobs in pr-test-multimodal-gen.yml continue to pin to `1-gpu-h100`.
+    runs-on: 1-gpu-h100-h200
     timeout-minutes: 240
     strategy:
       fail-fast: false

scripts/ci/utils/slash_command_handler.py

@@ -479,7 +479,7 @@ CUDA_SUITE_TO_RUNNER = {
     "stage-a-test-1-gpu-small": "1-gpu-5090",
     "stage-a-test-cpu": "ubuntu-latest",
     "stage-b-test-1-gpu-small": "1-gpu-5090",
-    "stage-b-test-1-gpu-large": "1-gpu-h100",
+    "stage-b-test-1-gpu-large": "1-gpu-h100-h200",
     "stage-b-test-2-gpu-large": "2-gpu-h100",
     "stage-b-test-4-gpu-b200": "4-gpu-b200",
     "stage-c-test-4-gpu-h100": "4-gpu-h100",