[CI] Enroll a fourth batch of five steps in automatic sharding (#60858)

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

.buildkite/test_areas/distributed.yaml

@@ -77,6 +77,7 @@ steps:
 
 - label: ":nvidia: (L4) Distributed DP Basic"
   key: distributed-dp-tests-2-gpus
+  automatic_shard: true
   timeout_in_minutes: 45
   working_dir: "/vllm-workspace/tests"
   device: l4
@@ -300,6 +301,7 @@ steps:
 
 - label: ":nvidia: (L4) Distributed DP Extended"
   key: distributed-dp-tests-4-gpus
+  automatic_shard: true
   timeout_in_minutes: 45
   working_dir: "/vllm-workspace/tests"
   device: l4
@@ -677,6 +679,7 @@ steps:
 
 - label: ":nvidia: (L4) RayExecutorV2"
   key: rayexecutorv2-4-gpus
+  automatic_shard: true
   timeout_in_minutes: 45
   working_dir: "/vllm-workspace/tests"
   device: l4

.buildkite/test_areas/engine.yaml

@@ -164,6 +164,7 @@ steps:
   device: h100
   num_devices: 2
   key: replayssm-e2e
+  automatic_shard: true
   timeout_in_minutes: 90
   working_dir: "/vllm-workspace/tests"
   source_file_dependencies:

.buildkite/test_areas/misc.yaml

@@ -653,6 +653,7 @@ steps:
 
 - label: ":nvidia: (H100) Batch Invariance"
   key: batch-invariance-h100
+  automatic_shard: true
   timeout_in_minutes: 60
   device: h100
   source_file_dependencies: