Raft integration tests often hang and time out

In the Fabric main branch, the Raft integration tests often hang and time out.

In the example at
https://github.com/hyperledger/fabric/actions/runs/4238750824/jobs/7366205715
the Raft integration tests fail after hung for 6 hours with error:
```
Got stuck at:
channel=testchannel node=3

Waiting for:
channel creation request not allowed because the orderer system channel is not defined
In [It] at: /home/runner/work/fabric/fabric/integration/raft/config_test.go:987
```