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

[vbotbuildovich]

https://buildkite.com/redpanda/vtools/builds/15113

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

test_id:    OMBValidationTest.test_max_partitions
status:     FAIL
run time:   888.522 seconds

<BadLogLines nodes=ip-10-1-7-111.us-west-2.compute.internal/rp-cpv4ds7nibmhevmq2uog-1(3) example="2024-06-28T06:36:14.084583059Z stderr F WARN  2024-06-28 06:36:14,084 [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 0x8338e7b 0x8042ec7 0x804e863 0x80adceb 0x80ad3e7 0x80a14a7 0x809de8b 0x81c10f3">
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 186, in wrapped
    redpanda.raise_on_bad_logs(
  File "/home/ubuntu/redpanda/tests/rptest/services/redpanda.py", line 2255, in raise_on_bad_logs
    lsearcher.search_logs(self.pods)
  File "/home/ubuntu/redpanda/tests/rptest/services/utils.py", line 197, in search_logs
    raise BadLogLines(bad_loglines)
rptest.services.utils.BadLogLines: <BadLogLines nodes=ip-10-1-7-111.us-west-2.compute.internal/rp-cpv4ds7nibmhevmq2uog-1(3) example="2024-06-28T06:36:14.084583059Z stderr F WARN  2024-06-28 06:36:14,084 [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 0x8338e7b 0x8042ec7 0x804e863 0x80adceb 0x80ad3e7 0x80a14a7 0x809de8b 0x81c10f3">

JIRA Link: CORE-5036