feat: decouple x/capability from simapp

[julienrbrt]

Description

Closes: #12069

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Author Checklist

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• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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• 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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• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #12256 (3d5e773) into main (8fa2fab) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #12256      +/-   ##
==========================================
+ Coverage   66.07%   66.16%   +0.08%     
==========================================
  Files         675      675              
  Lines       71280    71267      -13     
==========================================
+ Hits        47099    47152      +53     
+ Misses      21538    21468      -70     
- Partials     2643     2647       +4     

Impacted Files	Coverage Δ
simapp/app.go	77.08% <100.00%> (+4.35%)	⬆️
x/capability/module.go	59.49% <100.00%> (-9.84%)	⬇️
baseapp/baseapp.go	78.45% <0.00%> (-0.91%)	⬇️
x/group/keeper/keeper.go	54.43% <0.00%> (-0.43%)	⬇️
x/params/module.go	57.14% <0.00%> (+1.58%)	⬆️
crypto/keys/internal/ecdsa/privkey.go	83.01% <0.00%> (+1.88%)	⬆️
x/evidence/module.go	41.46% <0.00%> (+2.43%)	⬆️
x/mint/module.go	50.68% <0.00%> (+2.73%)	⬆️
x/distribution/simulation/operations.go	90.21% <0.00%> (+9.78%)	⬆️
... and 3 more