imp (claims): validate authorized channels in message to update claims params

[MalteHerrmann]

Description

This PR adds the validation of the authorized channels in a MsgUpdateParams before applying the changes.
It iterates through the available channels in app.ibcKeeper.ChannelKeeper and checks if the channels are present there.

---

Closes ENG-1400

[linear]

ENG-1400 Stateful Validation of claims params against stored values

Claim params values are not currently verified when using MsgUpdateParams . This could potentially cause that an invalid (non existent or closed) channel is registered in the module params

Scope of Work

• Check that claims Params.AuthorizedChannels exist in the channel keeper store (i.e call GetChannel and check that found is true)
• Check that claims Params.EvmChannels exist in the channel keeper store (i.e call GetChannel and check that found is true)
• Check that the channel state status is Open

[codecov]

Codecov Report

Merging #1378 (b8cf4f3) into main (7e98d8f) will increase coverage by 0.04%.
The diff coverage is 100.00%.

❗ Current head b8cf4f3 differs from pull request most recent head 4f22388. Consider uploading reports for the commit 4f22388 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1378      +/-   ##
==========================================
+ Coverage   72.23%   72.27%   +0.04%     
==========================================
  Files         259      259              
  Lines       17614    17640      +26     
==========================================
+ Hits        12724    12750      +26     
  Misses       4321     4321              
  Partials      569      569              

Impacted Files	Coverage Δ
app/app.go	82.09% <100.00%> (ø)
x/claims/keeper/keeper.go	85.18% <100.00%> (+0.56%)	⬆️
x/claims/keeper/msg_server.go	91.17% <100.00%> (+24.50%)	⬆️

[fedekunze]

Thanks @MalteHerrmann! left some minor comments

[fedekunze]

ACK, pending bug fix entry

[fedekunze]

@MalteHerrmann can you look into the tests and linter errors?