Cleanup: relocate temp_set_env and consolidate multi-device/CUDA helpers in common.py (#30180)

test/registered/debug_utils/test_dumper.py

@@ -39,8 +39,8 @@ from sglang.srt.debug_utils.dumper import (
     get_tensor_info,
     get_truncated_value,
 )
-from sglang.srt.environ import temp_set_env
 from sglang.srt.utils import kill_process_tree
+from sglang.srt.utils.common import temp_set_env
 from sglang.test.ci.ci_register import register_amd_ci, register_cuda_ci
 from sglang.test.test_utils import (
     DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,

test/registered/model_loading/test_runai_model_loader.py

@@ -1,7 +1,7 @@
 import unittest
 
 import sglang as sgl
-from sglang.srt.environ import temp_set_env
+from sglang.srt.utils.common import temp_set_env
 from sglang.test.ci.ci_register import register_cuda_ci
 from sglang.test.test_utils import CustomTestCase