[XPU CI] Re-enable stage B with docker-pull flow and split tests (#27526)

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

test/registered/attention/test_chunk_gated_delta_rule.py

@@ -10,7 +10,7 @@ from sglang.srt.utils import get_device
 from sglang.test.ci.ci_register import register_cuda_ci, register_xpu_ci
 
 register_cuda_ci(est_time=11, stage="base-b", runner_config="1-gpu-large")
-register_xpu_ci(est_time=900, suite="stage-a-test-1-gpu-xpu")
+register_xpu_ci(est_time=900, suite="stage-b-test-1-gpu-xpu")
 
 
 @unittest.skipIf(

test/registered/xpu/test_deepseek_ocr.py

@@ -19,7 +19,7 @@ from sglang.test.test_utils import (
     popen_launch_server,
 )
 
-register_xpu_ci(est_time=360, suite="stage-a-test-1-gpu-xpu")
+register_xpu_ci(est_time=360, suite="stage-b-test-1-gpu-xpu")
 
 
 class TestDeepSeekOCR(CustomTestCase):

test/registered/xpu/test_deepseek_ocr_triton.py

@@ -18,7 +18,7 @@ from sglang.test.test_utils import (
 
 register_xpu_ci(
     est_time=360,
-    suite="stage-a-test-1-gpu-xpu",
+    suite="stage-b-test-1-gpu-xpu",
     disabled="Temporarily disabled until Triton-XPU upgrade",
 )
 

test/registered/xpu/test_gemma_4_e2b.py

@@ -130,7 +130,11 @@ class TestGemma4E2BXPU(CustomTestCase):
 from sglang.test.ci.ci_register import register_xpu_ci
 
 # Single e2e test: boot + a short Q&A.
-register_xpu_ci(est_time=240, suite="stage-b-test-1-gpu-xpu")
+register_xpu_ci(
+    est_time=240,
+    suite="stage-b-test-1-gpu-xpu",
+    disabled="OOM on stage-b XPU runner (server launch fails with --mem-fraction-static)",
+)
 
 if __name__ == "__main__":
     unittest.main()

test/registered/xpu/test_intel_xpu_backend.py

@@ -16,7 +16,7 @@ from sglang.test.test_utils import (
     run_bench_one_batch,
 )
 
-register_xpu_ci(est_time=600, suite="stage-a-test-1-gpu-xpu")
+register_xpu_ci(est_time=600, suite="stage-b-test-1-gpu-xpu")
 
 
 def intel_xpu_benchmark(

test/registered/xpu/test_topk.py

@@ -11,7 +11,7 @@ from sglang.srt.layers.moe.topk import (
 from sglang.test.ci.ci_register import register_xpu_ci
 from sglang.test.test_utils import CustomTestCase
 
-register_xpu_ci(est_time=5, suite="stage-a-test-1-gpu-xpu")
+register_xpu_ci(est_time=5, suite="stage-b-test-1-gpu-xpu")
 
 
 # Nemotron-3 uses biased_grouped_topk