CI Failure (MetricCheckFailed) in RaftAvailabilityTest. test_leadership_transfer

[michael-redpanda]

https://buildkite.com/redpanda/redpanda/builds/50477

Module: rptest.tests.raft_availability_test
Class:  RaftAvailabilityTest
Method: test_leadership_transfer

test_id:    rptest.tests.raft_availability_test.RaftAvailabilityTest.test_leadership_transfer
status:     FAIL
run time:   23.475 seconds


    MetricCheckFailed('vectorized_raft_leadership_changes_total', 0.0, 1.0)
Traceback (most recent call last):
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/tests/runner_client.py", line 184, in _do_run
    data = self.run_test()
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/tests/runner_client.py", line 276, in run_test
    return self.test_context.function(self.test)
  File "/root/tests/rptest/services/cluster.py", line 105, in wrapped
    r = f(self, *args, **kwargs)
  File "/root/tests/rptest/tests/raft_availability_test.py", line 402, in test_leadership_transfer
    metric_check.expect([
  File "/root/tests/rptest/services/metrics_check.py", line 141, in expect
    raise error
rptest.services.metrics_check.MetricCheckFailed: MetricCheckFailed<vectorized_raft_leadership_changes_total old=0.0 new=1.0>

JIRA Link: CORE-4272

[travisdowns]

ci-ignore because links need to be the BK build link or PT is unhappy