[SystemResourceIssue] Why is the 60 client test better than the 300 client test

  Reducing the number of clients reduces the number of threads and the number of open files, and there is no write failure. The data file size difference between the three nodes disappears

Reproduce steps：

1. Setup a cluster with 3C3D(MultiLeaderConsensus)
2. Using 3BMs to insert data(client=100*3)
3. Setup a cluster with 3C3D(MultiLeaderConsensus)
4. Using 3BMs to insert data(client=20*3)

BM    -----  》  IoTDB Node

172.20.70.7    -----  》 172.20.70.22

172.20.70.8    -----  》 172.20.70.23

172.20.70.9    -----  》 172.20.70.24