fix: change SimulationState.InitialStake to sdkmath.Int

[facundomedica]

Description

Closes: #11795

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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 #11855 (335810e) into main (8076144) will decrease coverage by 0.05%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main   #11855      +/-   ##
==========================================
- Coverage   66.03%   65.97%   -0.06%     
==========================================
  Files         681      670      -11     
  Lines       71443    70717     -726     
==========================================
- Hits        47174    46654     -520     
+ Misses      21566    21394     -172     
+ Partials     2703     2669      -34     

Impacted Files	Coverage Δ
simapp/state.go	0.00% <0.00%> (ø)
types/module/simulation.go	0.00% <ø> (ø)
x/auth/simulation/genesis.go	71.83% <0.00%> (ø)
x/distribution/simulation/operations.go	80.54% <0.00%> (-9.73%)	⬇️
cosmovisor/cmd/cosmovisor/run.go
cosmovisor/cmd/cosmovisor/help.go
cosmovisor/process.go
cosmovisor/cmd/cosmovisor/main.go
cosmovisor/args.go
cosmovisor/upgrade.go
... and 5 more

[facundomedica]

Rosetta tests seem to be failing, but I didn't messed with that (at least directly)

[alexanderbez]

Rosetta tests seem to be failing, but I didn't messed with that (at least directly)

Yes, unrelated to this PR. Feel free to ignore it. See: #11846

[alexanderbez]

wohoo first core PR! 🎉