add integration test in which the smartbft leader must freeze, #4545
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waiting for an answer.
There was a case where the leader froze up and the followers couldn't change him.
There were two reasons for this:
a flaw in the behavior of the smartbft library
gateway was only for raft
Both reasons are fixed now.
But a test that showed this error would be nice to add.
For some reason, #4438 conflicts with main.
Second, clean attempt.
@C0rWin FYI