refactor: interchainstaking params

[aljo242]

1. Summary

Fixes QCK-546

[ajansari95]

LGTM

[codecov]

Codecov Report

Merging #541 (4012b0e) into unstable-v1.5 (b630108) will decrease coverage by 0.14%.
Report is 3 commits behind head on unstable-v1.5.
The diff coverage is 32.91%.

@@                Coverage Diff                @@
##           unstable-v1.5     #541      +/-   ##
=================================================
- Coverage          53.08%   52.94%   -0.14%     
=================================================
  Files                187      189       +2     
  Lines              15312    15355      +43     
=================================================
+ Hits                8128     8130       +2     
- Misses              6517     6556      +39     
- Partials             667      669       +2     

Flag	Coverage Δ
unittests	52.94% <32.91%> (-0.14%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
x/airdrop/types/params_legacy.go	40.00% <ø> (ø)
x/claimsmanager/types/params_legacy.go	60.00% <ø> (ø)
x/interchainstaking/keeper/keeper.go	71.51% <ø> (+0.16%)	⬆️
x/interchainstaking/keeper/params_legacy.go	0.00% <0.00%> (ø)
x/interchainstaking/keeper/proposal_handler.go	0.00% <0.00%> (ø)
x/interchainstaking/types/keys.go	40.74% <ø> (ø)
x/interchainstaking/types/msgs.go	66.02% <0.00%> (-3.32%)	⬇️
x/interchainstaking/types/params_legacy.go	44.04% <ø> (ø)
x/mint/types/params_legacy.go	44.61% <ø> (ø)
x/participationrewards/types/params_legacy.go	60.00% <ø> (ø)
... and 6 more