CI Failure (key symptom) in `ControlCharacterNag.test_validate_nag_message`

[vbotbuildovich]

https://buildkite.com/redpanda/redpanda/builds/50845

Module: rptest.tests.control_character_flag_test
Class: ControlCharacterNag
Method: test_validate_nag_message
Arguments: {
    "initial_version": [
        22,
        3,
        11
    ]
}

test_id:    ControlCharacterNag.test_validate_nag_message
status:     FAIL
run time:   54.340 seconds

HTTPError('503 Server Error: Service Unavailable for url: https://vectorized-public.s3.us-west-2.amazonaws.com/releases/redpanda/23.3.17/redpanda-23.3.17-amd64.tar.gz')
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 "/opt/.ducktape-venv/lib/python3.10/site-packages/ducktape/mark/_mark.py", line 535, in wrapper
    return functools.partial(f, *args, **kwargs)(*w_args, **w_kwargs)
  File "/root/tests/rptest/services/cluster.py", line 105, in wrapped
    r = f(self, *args, **kwargs)
  File "/root/tests/rptest/tests/control_character_flag_test.py", line 151, in test_validate_nag_message
    self._perform_update(initial_version)
  File "/root/tests/rptest/tests/control_character_flag_test.py", line 49, in _perform_update
    versions = self.load_version_range(initial_version)[1:]
  File "/root/tests/rptest/tests/redpanda_test.py", line 143, in load_version_range
    v = self.redpanda._installer.highest_from_prior_feature_version(v)
  File "/root/tests/rptest/services/redpanda_installer.py", line 511, in highest_from_prior_feature_version
    if not self._avail_for_download(v) and skip_versions > 0:
  File "/root/tests/rptest/services/redpanda_installer.py", line 449, in _avail_for_download
    r.raise_for_status()
  File "/opt/.ducktape-venv/lib/python3.10/site-packages/requests/models.py", line 941, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 503 Server Error: Service Unavailable for url: https://vectorized-public.s3.us-west-2.amazonaws.com/releases/redpanda/23.3.17/redpanda-23.3.17-amd64.tar.gz

JIRA Link: CORE-5039