Add a min_gas_price verification step in the health check process

[seanchen1991]

Summary

Add a min_gas_price verification step in the health check process.

Problem Definition

We often ask users to provide us with the min_gas_price value as part of their app.toml when debugging issues. Now that the SDK exposes this value over gRPC in v0.45.10, we can automatically check for this value as part of Hermes' health check process so that there wouldn't be a need to ask the user for this value directly.

Proposal

Add a min_gas_price verification step in the health check process that checks that the gas_price parameter in the Hermes config.toml file is set to be greater than or equal to the min_gas_price advertised by the chain.

This will require generating 0.46.4 IBC proto files in order to access the cosmos/base/node/v1beta1 gRPC endpoint in order to fetch the chain configuration.

Acceptance Criteria

• Generate 0.46.4 IBC proto files
• Added a min_gas_price verification step to the health check

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