refactor(ecocredit): update BatchInfo.BatchDenom to BatchInfo.Denom

[aleem1314]

Description

Closes: #1031

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Author Checklist

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• included the necessary unit and integration tests
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I have...

• confirmed the correct type prefix in the PR title
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• reviewed state machine logic
• reviewed API design and naming
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• manually tested (if applicable)

[ryanchristo]

Looking good. TestInitExportGenesis is failing CI checks, so it looks like some cases of batch_denom are still being used in the genesis code.

[codecov]

Codecov Report

Merging #1039 (268d06c) into master (9aa86c4) will decrease coverage by 10.89%.
The diff coverage is 64.28%.

❗ Current head 268d06c differs from pull request most recent head 16b2f6c. Consider uploading reports for the commit 16b2f6c to get more accurate results

@@             Coverage Diff             @@
##           master    #1039       +/-   ##
===========================================
- Coverage   59.83%   48.93%   -10.90%     
===========================================
  Files         226      225        -1     
  Lines       22765    23442      +677     
===========================================
- Hits        13622    11472     -2150     
- Misses       7823    10726     +2903     
+ Partials     1320     1244       -76     

Flag	Coverage Δ
experimental-codecov	48.80% <64.28%> (-10.93%)	⬇️
stable-codecov	41.71% <64.28%> (-11.56%)	⬇️

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[technicallyty]

lgtm

[technicallyty]

looks like merge from master broke some things, @aleem1314