[Test] Consolidate test cleanup and CI taxonomy (net -11.4K lines) (#37436)

Co-authored-by: Mick Qian <mickqian@users.noreply.github.com>

python/sglang/test/ci/ci_register.py

@@ -98,19 +98,6 @@ def register_amd_ci(
     return None
 
 
-def register_musa_ci(
-    est_time: float,
-    suite: Optional[str] = None,
-    nightly: bool = False,
-    disabled: Optional[str] = None,
-    *,
-    stage: Optional[str] = None,
-    runner_config: Optional[str] = None,
-):
-    """Marker for MUSA CI registration (parsed via AST; runtime no-op)."""
-    return None
-
-
 def register_npu_ci(
     est_time: float,
     suite: Optional[str] = None,

python/sglang/test/ci/diffusion_suite_bridge.py

@@ -0,0 +1,35 @@
+"""Bridge registered diffusion suites to their case-aware pytest adapter."""
+
+import os
+import sys
+from pathlib import Path
+
+
+def _enabled(name: str) -> bool:
+    return os.environ.get(name, "").lower() in {"1", "true", "yes", "on"}
+
+
+def run_diffusion_suite(suite: str) -> None:
+    """Run one legacy-named diffusion suite without exposing a second CI CLI."""
+
+    from sglang.multimodal_gen.test.runner.diffusion_suite_runner import main
+
+    args = [sys.argv[0], "--suite", suite]
+    optional_values = (
+        ("DIFFUSION_PARTITION_ID", "--partition-id"),
+        ("DIFFUSION_TOTAL_PARTITIONS", "--total-partitions"),
+        ("DIFFUSION_PARTITION_PLAN_JSON", "--partition-plan-json"),
+        ("DIFFUSION_PYTEST_FILTER", "--filter"),
+    )
+    for environment_name, option in optional_values:
+        value = os.environ.get(environment_name)
+        if value:
+            args.extend([option, value])
+    if _enabled("DIFFUSION_CONTINUE_ON_ERROR"):
+        args.append("--continue-on-error")
+
+    # Preserve the historical cwd: several diffusion fixtures emit artifacts
+    # relative to ``python/`` rather than to their source file.
+    os.chdir(Path(__file__).resolve().parents[4] / "python")
+    sys.argv = args
+    main()