chore: update x/leverage messages codec

[alexanderbez]

Description

Add missing message types to codec registration.

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Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added appropriate labels to the PR
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[alexanderbez]

Just an FYI @toteki -- when we add a new message type, we have to be sure to update codec.go 👍

[codecov-commenter]

Codecov Report

Merging #612 (ed02375) into main (c646ad7) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #612      +/-   ##
==========================================
+ Coverage   48.44%   48.47%   +0.02%     
==========================================
  Files          63       63              
  Lines        7932     7936       +4     
==========================================
+ Hits         3843     3847       +4     
  Misses       3831     3831              
  Partials      258      258              

Impacted Files	Coverage Δ
x/leverage/types/codec.go	48.00% <100.00%> (+9.90%)	⬆️