[improve](cloud) Shuffle the partitions to reduce committing conflicts (#59212)

Author: w41ter

cloud/src/common/config.h

@@ -305,6 +305,8 @@ CONF_Bool(enable_cloud_txn_lazy_commit, "true");
 CONF_Int32(txn_lazy_commit_rowsets_thresold, "1000");
 CONF_Int32(txn_lazy_commit_num_threads, "8");
 CONF_mInt64(txn_lazy_max_rowsets_per_batch, "1000");
+CONF_mBool(txn_lazy_commit_shuffle_partitions, "true");
+CONF_Int64(txn_lazy_commit_shuffle_seed, "0"); // 0 means generate a random seed
 // max TabletIndexPB num for batch get
 CONF_Int32(max_tablet_index_num_per_batch, "1000");
 CONF_Int32(max_restore_job_rowsets_per_batch, "1000");