Fix os exit issue (#3893)

Make os exit correctly. Signed-off-by: Cui, Lily <lily.cui@intel.com> Co-authored-by: Chunyuan WU <chunyuan.wu@intel.com>

Author: cyxlily

intel_extension_for_pytorch/__init__.py

@@ -33,7 +33,7 @@
  + f"{ipex_version}.*, but PyTorch {torch.__version__} is found. "
  + "Please switch to the matching version and run again."
  )
- os.exit(127)
+ os._exit(127)
 
 
 import os