Add support for IPython's system_raise_on_error

configuration option in ZMQInteractiveShell.system_piped() override.

This complements IPython PR #15073
(ipython/ipython#15073) that adds
the system_raise_on_error config option. Since ZMQInteractiveShell overrides system_piped() for Windows UNC path handling, it
needs to also check the system_raise_on_error config and raise CalledProcessError on non-zero exit status.

Author: adityawasudeo

ipykernel/zmqshell.py

@@ -790,8 +790,7 @@ def system_piped(self, cmd):
             exit_code = system(self.var_expand(cmd, depth=1))
             self.user_ns["_exit_code"] = exit_code
 
-        # Raise an exception if the command failed and system_raise_on_error is True
-        if self.system_raise_on_error and exit_code != 0:
+        if getattr(self, 'system_raise_on_error', False) and exit_code != 0:
             raise CalledProcessError(exit_code, cmd)
 
     # Ensure new system_piped implementation is used