fix: x/gov migrations

[atheeshp]

Description

Closes: #13044

---

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 ! 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
• followed the guidelines for building modules
• included the necessary unit and integration tests
• 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

All items are required. Please add a note if the item is not applicable and please add
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)

[codecov]

Codecov Report

Merging #13045 (f911f60) into main (bc274d8) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #13045      +/-   ##
==========================================
+ Coverage   54.06%   54.07%   +0.01%     
==========================================
  Files         644      645       +1     
  Lines       54956    54969      +13     
==========================================
+ Hits        29710    29724      +14     
+ Misses      22887    22886       -1     
  Partials     2359     2359              

Impacted Files	Coverage Δ
x/gov/migrations/v3/json.go	70.00% <100.00%> (-6.00%)	⬇️
x/gov/migrations/v4/json.go	100.00% <100.00%> (ø)
crypto/keys/internal/ecdsa/privkey.go	83.01% <0.00%> (+1.88%)	⬆️

[amaury1093]

LGTM

[likhita-809]

lgtm