rpk: encourage users to restart nodes on config change if required
Fixes https://github.com/redpanda-data/redpanda/issues/7420
Backports Required
- [ ] none - not a bug fix
- [ ] none - issue does not exist in previous branches
- [ ] none - papercut/not impactful enough to backport
- [x] v22.3.x
- [x] v22.2.x
- [ ] v22.1.x
UX Changes
Upon completion of rpk cluster config edit or rpk cluster config set, print the following message if restart is required:
Cluster needs to be restarted. See more details with 'rpk cluster config status'
@daisukebe - can we packport this change to 22.2.x too
/backport v22.2.8
/backport v22.3.4
Fixed the failed test.
Thanks ! @daisukebe
/backport v22.2.x
/backport v22.3.x
@daisukebe fyi i update the release notes section of the pr body