feat: add ecocredit batch metadata migration

[ryanchristo]

Description

This pull request adds state migrations for the ecocredit module to update batch metadata for all credit batches. This pull request also adds an upgrade handler for v5.1 to perform the migration.

Manual Testing: https://hackmd.io/Bt6MBd45Rru3P6kzlIZkCw

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Author Checklist

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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

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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)

[codecov]

Codecov Report

Merging #1812 (0609bee) into main (61091a3) will increase coverage by 0.16%.
The diff coverage is 92.17%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1812      +/-   ##
==========================================
+ Coverage   73.12%   73.28%   +0.16%     
==========================================
  Files         228      230       +2     
  Lines       13557    13672     +115     
==========================================
+ Hits         9913    10019     +106     
- Misses       2917     2924       +7     
- Partials      727      729       +2     

Impacted Files	Coverage Δ
app/app.go	92.68% <ø> (ø)
x/ecocredit/server/migrations.go	26.31% <0.00%> (-4.94%)	⬇️
x/ecocredit/migrations/v4/state.go	94.39% <94.39%> (ø)
app/upgrades/v5_1/upgrade.go	100.00% <100.00%> (ø)