refactor(x/ecocredit): update market params API

[technicallyty]

Description

• updates the marketplace params proto definitions

Closes: n/a

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Author Checklist

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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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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[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@d0977e6). Click here to learn what that means. The diff coverage is 28.57%.

@@            Coverage Diff            @@
##             master     #963   +/-   ##
=========================================
  Coverage          ?   72.99%           
=========================================
  Files             ?      196           
  Lines             ?    23365           
  Branches          ?        0           
=========================================
  Hits              ?    17055           
  Misses            ?     4996           
  Partials          ?     1314           

Flag	Coverage Δ
experimental-codecov	72.87% <28.57%> (?)
stable-codecov	67.89% <28.57%> (?)

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

[ryanchristo]

Closing per #1342 and #1346