refactor: consolidate is_in_ci (jit_kernel, sgl-kernel benchmarks, tests) (#21009)

sgl-kernel/benchmark/bench_fp8_blockwise_group_gemm.py

@@ -1,11 +1,4 @@
 import argparse
-import os
-
-# CI environment detection
-IS_CI = (
-    os.getenv("CI", "false").lower() == "true"
-    or os.getenv("GITHUB_ACTIONS", "false").lower() == "true"
-)
 import random
 from dataclasses import dataclass
 from typing import List, Tuple
@@ -14,6 +7,10 @@ import deep_gemm
 import torch
 from sgl_kernel import fp8_blockwise_scaled_grouped_mm
 
+from sglang.utils import is_in_ci
+
+IS_CI = is_in_ci()
+
 
 def get_m_alignment_for_contiguous_layout():
     return 128