[v23.3.x] k/group: do not replicate empty offsets commit batch

[vbotbuildovich]

Backport #22797 to branch v23.3.x. Note that this issue was created as a placeholder, since the original PR's commit(s) could not be automatically cherry-picked.
Here are the commands to execute:

git checkout v23.3.x
git checkout -b vbotbuildovich/backport-22797-v23.3.x-16
git cherry-pick -x e6966144dd401e15e3cdd68837956e15c0146828

git push origin vbotbuildovich/backport-22797-v23.3.x-16
gh pr create \
  --title "[v23.3.x] k/group: do not replicate empty offsets commit batch" \
  --base "v23.3.x" \
  --label "kind/backport" \
  --head "vbotbuildovich/backport-22797-v23.3.x-16" \
  --draft \
  --repo "redpanda-data/redpanda" \
  --milestone "v23.3.x-next" \
  --body "Backport of PR https://github.com/redpanda-data/redpanda/pull/22797 "

JIRA Link: [CORE-6842](https://redpandadata.atlassian.net/browse/CORE-6842)