refactor(ecocredit): delete v1alpha2 types

[aleem1314]

Description

Closes: #898

• removed v1alpha2 proto and implementation
• removed unused files & functions

---

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 #1063 (cf39b33) into master (4ecc793) will decrease coverage by 5.67%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #1063      +/-   ##
==========================================
- Coverage   68.59%   62.92%   -5.68%     
==========================================
  Files         224      215       -9     
  Lines       21681    19390    -2291     
==========================================
- Hits        14873    12201    -2672     
- Misses       5467     5926     +459     
+ Partials     1341     1263      -78     

Flag	Coverage Δ
experimental-codecov	?
stable-codecov	62.92% <80.00%> (+0.29%)	⬆️

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[ryanchristo]

Looks good to me. We should delete the v1alpha2 directory though. This version was never used in production and therefore is no longer needed. Pre-approving.

[technicallyty]

lgtm