fix!: remove denom from DenomMetadata key

[aleem1314]

Description

Closes: #9643

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Author Checklist

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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

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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 #9890 (bcc60c7) into master (055e7e8) will increase coverage by 0.00%.
The diff coverage is 76.00%.

❗ Current head bcc60c7 differs from pull request most recent head b1802b2. Consider uploading reports for the commit b1802b2 to get more accurate results

@@           Coverage Diff           @@
##           master    #9890   +/-   ##
=======================================
  Coverage   63.59%   63.60%           
=======================================
  Files         568      568           
  Lines       53490    53509   +19     
=======================================
+ Hits        34019    34035   +16     
- Misses      17547    17549    +2     
- Partials     1924     1925    +1     

Impacted Files	Coverage Δ
x/bank/migrations/v043/keys.go	12.50% <0.00%> (-2.89%)	⬇️
x/bank/types/key.go	82.35% <ø> (+12.35%)	⬆️
x/bank/migrations/v044/store.go	73.68% <85.00%> (+5.26%)	⬆️
x/bank/keeper/keeper.go	72.37% <100.00%> (ø)

[orijbot]

Visit https://dashboard.github.orijtech.com?pr=9890&remote=false&repo=cosmos%2Fcosmos-sdk to see benchmark details.

[amaury1093]

lgtm