[CI] Enroll five steps in automatic sharding (#60492)

Signed-off-by: Thang Nguyen <thangnguyenvn647@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: khluu <khluu000@gmail.com>

.buildkite/test_areas/entrypoints.yaml

@@ -231,6 +231,7 @@ steps:
 - label: ":nvidia: (H200 MIG 35GB) Entrypoints Integration (Pooling)"
   device: h200_35gb
   key: entrypoints-integration-pooling
+  automatic_shard: true
   timeout_in_minutes: 75
   working_dir: "/vllm-workspace/tests"
   source_file_dependencies:

.buildkite/test_areas/kernels.yaml

@@ -504,6 +504,7 @@ steps:
 - label: ":nvidia: (H200 MIG 35GB) Mamba Kernels"
   device: h200_35gb
   key: kernels-mamba-test
+  automatic_shard: true
   timeout_in_minutes: 60
   source_file_dependencies:
   - csrc/mamba/

.buildkite/test_areas/quantization.yaml

@@ -127,6 +127,7 @@ steps:
 - label: ":nvidia: (H200 MIG 35GB) Quantized Models"
   device: h200_35gb
   key: quantized-models-test
+  automatic_shard: true
   timeout_in_minutes: 65
   env:
     VLLM_USE_V2_MODEL_RUNNER: "0"

.buildkite/test_areas/spec_decode.yaml

@@ -5,6 +5,7 @@ steps:
 - label: ":nvidia: (H200 MIG 35GB) V1 Spec Decode"
   device: h200_35gb
   key: v1-spec-decode
+  automatic_shard: true
   timeout_in_minutes: 40
   source_file_dependencies:
     - vllm/config/