CI Failure (key symptom) in `OMBValidationTest.test_max_partitions`

[vbotbuildovich]

https://buildkite.com/redpanda/vtools/builds/13453

Module: rptest.redpanda_cloud_tests.omb_validation_test
Class: OMBValidationTest
Method: test_max_partitions

test_id:    OMBValidationTest.test_max_partitions
status:     FAIL
run time:   845.222 seconds

<BadLogLines nodes=ip-10-1-7-13.us-west-2.compute.internal/rp-coq6lbn92bfbrk8ajkbg-0(3) example="2024-05-03T05:56:09.498246245Z stderr F WARN  2024-05-03 05:56:09,497 [shard  2:admi] seastar_memory - oversized allocation: 413696 bytes. This is non-fatal, but could lead to latency and/or fragmentation issues. Please report: at 0x81984ab 0x7ea2b8b 0x7eae527 0x7f0d9ab 0x7f0d0a7 0x7f01167 0x7efdb4b 0x8020da3">
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 "/home/ubuntu/redpanda/tests/rptest/services/cluster.py", line 178, in wrapped
    redpanda.raise_on_bad_logs(
  File "/home/ubuntu/redpanda/tests/rptest/services/redpanda.py", line 2165, in raise_on_bad_logs
    lsearcher.search_logs(self.pods)
  File "/home/ubuntu/redpanda/tests/rptest/services/utils.py", line 166, in search_logs
    raise BadLogLines(bad_loglines)
rptest.services.utils.BadLogLines: <BadLogLines nodes=ip-10-1-7-13.us-west-2.compute.internal/rp-coq6lbn92bfbrk8ajkbg-0(3) example="2024-05-03T05:56:09.498246245Z stderr F WARN  2024-05-03 05:56:09,497 [shard  2:admi] seastar_memory - oversized allocation: 413696 bytes. This is non-fatal, but could lead to latency and/or fragmentation issues. Please report: at 0x81984ab 0x7ea2b8b 0x7eae527 0x7f0d9ab 0x7f0d0a7 0x7f01167 0x7efdb4b 0x8020da3">

JIRA Link: CORE-2780