In case that we want to clone a replica with version X, but a replica with stale version(less than X) is already in the dest backend.
This will leads the clone task to success directly, which is not what we expected.
Adding version check when doing the clone task and try to drop the replica with stale version
* cluster can acquire more backends in same host
* compile failed
* count* 's subquery with orderby exec error
* modify show processlist result and check name format error
* merge log and add cancel cluster for root, show backends for users in cluster
* returns null when the param does not match
* update UpdateClusterAndBackends to BackendIdsUpdateInfo
* correct Licenses
