[improvement](cloud rebalance) make multiple fe consistent of tablet's backend #40771#41458

gavinchou merged 2 commits intoapache:branch-3.0apache/doris:branch-3.0from

yujun777:pick_40771_to_upstream_branch-3.0yujun777/doris:pick_40771_to_upstream_branch-3.0Copy head branch name to clipboard