fix(inflation): lock default inflation params with tokenomics curve

[k-yang]

Description

• Adjusts the default x/inflation params to follow the tokenomics curve
  See math at https://docs.google.com/spreadsheets/d/1eL0E_GcIJajXdDSl3jUwKK7mKycvmJltXFJxD1sout4/edit#gid=0

Purpose

Follows the inflation curve

[codecov]

Codecov Report

Merging #1661 (4dab028) into master (b99417c) will not change coverage.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1661   +/-   ##
=======================================
  Coverage   74.28%   74.28%           
=======================================
  Files         191      191           
  Lines       15096    15096           
=======================================
  Hits        11214    11214           
  Misses       3251     3251           
  Partials      631      631           

Files	Coverage Δ
app/app.go	57.60% <100.00%> (ø)
app/keepers.go	99.20% <100.00%> (ø)
wasmbinding/wasm.go	100.00% <100.00%> (ø)
x/inflation/keeper/inflation.go	81.69% <ø> (ø)
x/inflation/types/params.go	73.91% <100.00%> (ø)

[k-yang]

Obsoleted by #1670.