Gaia manager hermes config command writes incorrect strategy

[adizere]

Crate

gm

Summary of Bug

The gm hermes config command overwrites entirely the config file of Hermes. This is generally not a problem, except we recently changed how the global section of Hermes config looks like, and gm needs to be updated to reflect these recent changes.

Concretely, it used to be that the strategy field in the global section of the Hermes config was a String with the default value of naive (and was even ignored):

https://github.com/informalsystems/ibc-rs/blob/d9ce34bb961d5750366dbc970fd116a638424d07/config.toml#L1-L2

With PR #924 we changed the valid options for the strategy field to be different:

https://github.com/informalsystems/ibc-rs/blob/7c0418e3f6adf270a2a91f19b39a0141234c7545/config.toml#L1-L5

gm v0.0.1 will write naive in this field, which Hermes will not recognize.

Version

7c0418e

Steps to Reproduce

$ gm start
$ gm hermes config
$ gm hermes keys

error: hermes fatal error: parse error: unknown variant `naive`, expected `packets` or `all` for key `global.strategy` at line 76 column 1

Acceptance Criteria

• gm hermes config builds a config file that Hermes can parse correctly;
• stretch goal: gm hermes config should leave the global section of the config untouched.

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