FAIL test: ConnectionRateLimitTest.connection_rate_test

[andijcr]

FAIL test: ConnectionRateLimitTest.connection_rate_test (1/30 runs)
   failure at 2022-11-15T07:29:51.473Z: AssertionError('Time for first iteration:2.809500253200531 Time for second iteration    :4.623766374588013')
       in job https://buildkite.com/redpanda/redpanda/builds/18585#018479ad-5bb7-4b7e-8e50-b8f3f5d9862c

failure mode seems a bit different than #6074

[INFO  - 2022-11-15 06:17:37,022 - runner_client - log - lineno:278]: RunnerClient: rptest.tests.connection_rate_limit_test.ConnectionRateLimitTest.connection_rate_test: Summary: AssertionError('Time for first iteration:2.809500253200531 Time for second iteration:4.623766374588013')
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 "/root/tests/rptest/tests/connection_rate_limit_test.py", line 126, in connection_rate_test
    assert time2 >= time1 * 1.7, f'Time for first iteration:{time1} Time for second iteration:{time2}'
AssertionError: Time for first iteration:2.809500253200531 Time for second iteration:4.623766374588013

[INFO  - 2022-11-15 06:17:37,022 - runner_client - log - lineno:278]: RunnerClient: rptest.tests.connection_rate_limit_test.ConnectionRateLimitTest.connection_rate_test: Data: None