Export methods for in-place-testnet command

[codchen]

Describe your changes and provide context

in-place testnet needs to modify certain tendermint states in order to fork. This PR exposes the necessary functions.

Testing performed to validate your change

integration with sei-cosmos

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.24%. Comparing base (184afc7) to head (d8e9b5e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #255      +/-   ##
==========================================
+ Coverage   58.23%   58.24%   +0.01%     
==========================================
  Files         249      249              
  Lines       34559    34559              
==========================================
+ Hits        20124    20129       +5     
+ Misses      12847    12836      -11     
- Partials     1588     1594       +6     

Files with missing lines	Coverage Δ
node/node.go	58.39% <100.00%> (ø)

... and 15 files with indirect coverage changes