refactor!: remove deprecated sdk.NewLevelDB

[julienrbrt]

Description

Closes: #11241

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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 #13380 (bf08f48) into main (55373cb) will decrease coverage by 0.29%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13380      +/-   ##
==========================================
- Coverage   54.61%   54.32%   -0.30%     
==========================================
  Files         642      639       -3     
  Lines       55477    54600     -877     
==========================================
- Hits        30297    29659     -638     
+ Misses      22748    22559     -189     
+ Partials     2432     2382      -50     

Impacted Files	Coverage Δ
types/utils.go	89.61% <ø> (+6.47%)	⬆️
math/uint.go
math/int.go
math/dec.go
x/group/keeper/keeper.go	56.64% <0.00%> (+0.39%)	⬆️
x/staking/simulation/operations.go	75.91% <0.00%> (+1.37%)	⬆️
crypto/keys/internal/ecdsa/privkey.go	83.01% <0.00%> (+1.88%)	⬆️