Enable misbehavior detection by default

[adizere]

Summary

Following the work in #2001, we have managed to reduce the pressure on full nodes. This is a good moment for us to re-enable by default misbehavior detection.

https://github.com/informalsystems/hermes/blob/master/config.toml#L27

Problem Definition

Misbehavior detection is important. By keeping it disabled by default in Hermes, we encourage operators implicitly to keep it disabled. Following discussions with the IBC-go team, we have decided to enable this by default.

For more context, see this comment #2001 (comment)

Acceptance Criteria

• Hermes out-of-the-box ships with misbehavior detection enabled by default
  • make misbehavior = true by default in the config.toml and default setting of the Hermes relayer library

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