go/roothash/tests: Increase the duration of the receive timeout

In unit tests, CometBFT typically generates consensus blocks
at a rate of 10 per second. However, if consensus timeout occurs
in steps RoundStepPropose or RoundStepPrecommitWait, this rate
can significantly decrease to just 1 block per second or even
worse. If test requires waiting for a few consensus blocks,
these delays can accumulate and potentially lead to failures.

go/roothash/tests/tester.go

@@ -32,7 +32,7 @@ import (
 )
 
 const (
-	recvTimeout = 5 * time.Second
+	recvTimeout = 10 * time.Second
 	nrRuntimes  = 3
 )