CI Failure (AttributeError: 'NoneType' object has no attribute 'account') in ControllerEraseTest.test_erase_controller_log

[michael-redpanda]

https://buildkite.com/redpanda/redpanda/builds/31315#0188bb4d-3ca5-4880-ad04-85b08adfc975

Module: rptest.tests.controller_erase_test
Class:  ControllerEraseTest
Method: test_erase_controller_log
Arguments:
{
  "partial": false
}

test_id:    rptest.tests.controller_erase_test.ControllerEraseTest.test_erase_controller_log.partial=False
status:     FAIL
run time:   53.410 seconds


    AttributeError("'NoneType' object has no attribute 'account'")
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/ducktape/tests/runner_client.py", line 135, in run
    data = self.run_test()
  File "/usr/local/lib/python3.10/dist-packages/ducktape/tests/runner_client.py", line 227, in run_test
    return self.test_context.function(self.test)
  File "/usr/local/lib/python3.10/dist-packages/ducktape/mark/_mark.py", line 481, in wrapper
    return functools.partial(f, *args, **kwargs)(*w_args, **w_kwargs)
  File "/root/tests/rptest/services/cluster.py", line 79, in wrapped
    r = f(self, *args, **kwargs)
  File "/root/tests/rptest/tests/controller_erase_test.py", line 118, in test_erase_controller_log
    assert self.redpanda.search_log_node(bystander_node,
  File "/root/tests/rptest/services/redpanda.py", line 3454, in search_log_node
    for line in node.account.ssh_capture(
AttributeError: 'NoneType' object has no attribute 'account'