[v25.1.x] DisablingPartitionsTest::test_disable: deflake hwm

[vbotbuildovich]

Backport #27741 to branch v25.1.x. This issue was created as a placeholder because the original PR's commit(s) could not be automatically cherry-picked.
Here are the commands to execute:

git checkout v25.1.x
git checkout -b manual-backport-27741-v25.1.x-205
git cherry-pick -x 7063b88166

git push origin manual-backport-27741-v25.1.x-205
gh pr create \
  --title "[v25.1.x] DisablingPartitionsTest::test_disable: deflake hwm" \
  --base "v25.1.x" \
  --label "kind/backport" \
  --head "manual-backport-27741-v25.1.x-205" \
  --draft \
  --repo "redpanda-data/redpanda" \
  --milestone "v25.1.x-next" \
  --body "Backport of PR https://github.com/redpanda-data/redpanda/pull/27741 "

[joe-redpanda]

#29387