Gov proposal support for IBC client update

[jtalis]

Summary

Add support for ibc.core.client.v1.ClientUpdateProposal using gov submit-proposal

Problem Definition

When attempting to submit an IBC client update governance proposal using provenanced tx gov submit-proposal, an error is thrown Error: no concrete type registered for type URL /ibc.core.client.v1.ClientUpdateProposal against interface *types.Msg.

The following proposal json was attempted:

{
  "messages": [
    {
      "@type": "/ibc.core.client.v1.ClientUpdateProposal",
      "title": "unfreeze FES zone client",
      "description": "unfreeze expired FES zone client",
      "subject_client_id": "07-tendermint-64",
      "substitute_client_id": "07-tendermint-75"
    }
  ],
  "deposit": "1nhash"

Submitting the proposal using the submit legacy path works fine. See https://explorer.test.provenance.io/tx/AEB84C595871E0F009309E6CE3815E1F345E88DEFC5F299959998E05674CDDD8/17341185 for an example of the proposal submitted using the legacy flow.

Proposal

Add support for ibc.core.client.v1.ClientUpdateProposal using gov submit-proposal

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[nullpointer0x00]

ibc.core.client.v1.ClientUpdateProposal cannot be supported by gov submit-proposal since it is not of type sdk.Msg. It implements the legacy proposal type. You will have to continue using the legacy path for now.
In a future version (v.8.0.0) ibc-go will be deprecating the ibc.core.client.v1.ClientUpdateProposal and moving to the new sdk.Msg MsgRecoverClient instead that can be used with the gov submit-proposal method. https://github.com/cosmos/ibc-go/blob/0d524eca07e0a99519356f1767c5c4c267a31779/proto/ibc/core/client/v1/client.proto#L72C27-L72C43

@jtalis I would continue using the legacy method for submitting those proposals and plan on moving to MsgRecoverClient in a future release.

[nullpointer0x00]

The new msgs will be implemented in provenance when this issue is completed: #1707

For more details on ibc-go change: cosmos/ibc-go#4620