branch-2.1: [fix](mtmv)fix mtmv deadlock issue #43426
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mtmv deadlock when - table1 is olapTable - mv1 is MTMV create by table1 - mv2 is MTMV create by table1 reason: - mtmv-task-thread-1: refresh mv1, blocked write lock :mv1 - show partitions: hold read lock: mv1 ,block read lock: table1 - insert into table1: block write lock: table1 - mtmv-task-thread-2: refresh mv2, hold read lock: table1, blocked read lock :mv1 Problem Summary: show partitions: not hold readLock of olapTable and MTMV at same time getAndCopyPartitionItems: set max wait time Co-authored-by: zhangdong <zhangdong@selectdb.com>
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Cherry-picked from #43376