cherry-pick some PRs 2 round#11

Merged

3AceShowHand merged 3 commits intopingcap:v1.41.2-pingcapfrom

3AceShowHand:second-round

Apr 17, 2026

Commits on Apr 17, 2026

fix(client): add nilguards to updateBroker (#3393)

dnwe
authored and
3AceShowHand
committed
feat: return KError instead of errors in AlterConfigs and DescribeConfigs (#2472)

authored and
3AceShowHand
committed
fix(producer): treat ErrKafkaStorageError as retriable (#2939)

richardartoul
authored and
3AceShowHand
committed