feat(ecocredit): add credit types state migration

[aleem1314]

Description

Ref: #1049

---

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 #1061 (f419fe5) into master (2b08585) will decrease coverage by 0.31%.
The diff coverage is 16.30%.

@@            Coverage Diff             @@
##           master    #1061      +/-   ##
==========================================
- Coverage   68.70%   68.39%   -0.32%     
==========================================
  Files         216      216              
  Lines       21355    21418      +63     
==========================================
- Hits        14672    14648      -24     
- Misses       5337     5416      +79     
- Partials     1346     1354       +8     

Flag	Coverage Δ
experimental-codecov	68.39% <16.30%> (-0.21%)	⬇️
stable-codecov	?

Flags with carried forward coverage won't be shown. Click here to find out more.

[ryanchristo]

Looking good. A small nit and an undefined variable.

[technicallyty]

lgtm!

[ryanchristo]

Looking good. A couple nits and a question.

[ryanchristo]

Looks good to me.