refactor(x/ecocredit): consistent address field names

[ryanchristo]

Description

Closes: #1080

This pull requests makes the following changes to field names:

• All previous references to owner in relation to sell orders have been renamed to seller (previously we were using owner and seller but we are using buyer for buy orders and owner for credits)
• All previous references to account for credit balances have been renamed to address (previously we were using account and address but address is more in line with the sdk bank module)
• All previous references of holder in relation to credits being cancelled, retired, and bridged have been renamed to owner (previously we were using holder and owner)

This pull request also updates SellOrdersByAddress to SellOrdersBySeller.

---

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 #1153 (92760d5) into master (f5c7cd9) will decrease coverage by 0.01%.
The diff coverage is 73.17%.

@@            Coverage Diff             @@
##           master    #1153      +/-   ##
==========================================
- Coverage   69.36%   69.34%   -0.02%     
==========================================
  Files         220      220              
  Lines       22798    22798              
==========================================
- Hits        15814    15810       -4     
- Misses       5602     5606       +4     
  Partials     1382     1382              

Flag	Coverage Δ
experimental-codecov	69.39% <73.17%> (+0.07%)	⬆️
stable-codecov	63.64% <71.54%> (-0.08%)	⬇️

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

[clevinson]

Generally giving a concept ACK on this. I do think it might be better to try and stay consistent with bank module usage of address where appropriate.

So I think:

• QueryBalanceReuqest
• QueryBalancesRequest
• BatchBalanceInfo
• BatchBalance

Might be better to keep as "address" instead of "owner".

[clevinson]

Suggested change

	// seller is the address of the account that is selling credits.
	// seller is the address (in bytes) of the account that is selling credits.

maybe it still makes sense to explicitly state that its in byte representation?

[ryanchristo]

I don't think it's necessary. I previously made a change to add something like "unique string identifier" in relation to credit class IDs and it was pointed out that this is excessive because the field clearly states the type. I would have agreed before but I don't think we need to state the type unless we are adding details such as "any arbitrary string".

[technicallyty]

👍🏻