Add & update IBC queriers for relayer use

[cwgoes]

Closes #5829
Closes #5617

Note that for #5617 all channels are still iterated over, since we don't store a reverse mapping from connection identifiers to a set of channels. I think this is fine for now - we don't really want to store that in Merklized state since there is no reason to use it in the state machine.

[codecov]

Codecov Report

Merging #5901 into ibc-alpha will decrease coverage by 0.05%.
The diff coverage is 25.64%.

@@              Coverage Diff              @@
##           ibc-alpha    #5901      +/-   ##
=============================================
- Coverage      59.30%   59.25%   -0.06%     
=============================================
  Files            397      397              
  Lines          22988    23015      +27     
=============================================
+ Hits           13634    13638       +4     
- Misses          8434     8457      +23     
  Partials         920      920              

[fedekunze]

I think (?) this should use a pointer *ConnectionEnd. I'd also double-check that the JSON field is "connection_end" instead of "ConnectionEnd"

[cwgoes]

Ah, the idea was to embed the JSON fields - does that not work?

[jackzampolin]

This is working on the relayer fwiw, but would be helpful to add a json tag: json:"connection_end"

[jackzampolin]

[
  {
    "ConnectionEnd": {
      "state": "OPEN",
      "client_id": "ibconeclient",
      "counterparty": {
        "client_id": "ibczeroclient",
        "connection_id": "ibczeroconnection",
        "prefix": {
          "type": "ibc/commitment/MerklePrefix",
          "value": {
            "key_prefix": "aWJj"
          }
        }
      },
      "versions": [
        "1.0.0"
      ]
    },
    "identifier": "ibconeconnection"
  }
]

[cwgoes]

Ah my bad - updated!

[fedekunze]

open to suggestion but wouldn't it be cleaner to add the identifier to the IdentifiedConnectionEnd flattened?

[
  {
      "identifier": "ibconeconnection",
      "state": "OPEN",
      "client_id": "ibconeclient",
      "counterparty": {
        "client_id": "ibczeroclient",
        "connection_id": "ibczeroconnection",
        "prefix": {
          "type": "ibc/commitment/MerklePrefix",
          "value": {
            "key_prefix": "aWJj"
          }
        }
      },
      "versions": [
        "1.0.0"
      ]
  }
]

[cwgoes]

That was what I originally tried to do - how does one do that in Go (is that what the pointer is for)?

[jackzampolin]

This is ready to go!