Injective-specific account info protobuf (#3144)

### Description

Only change needed was to correctly handle the account info. Because we
may want to handle injective testnet, added `is_injective` fn to
HyperlaneDomain instead of just doing the match directly. Happy to
import some of the longer fully qualified names instead

### Drive-by changes

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### Related issues

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- Fixes #[issue number here]
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### Backward compatibility

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### Testing

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