tests: added chain simulation

[javiersuweijie]

Need to first patch vendors using this https://github.com/terra-money/alliance#running-the-simulation

Run using make simulate

[codecov-commenter]

Codecov Report

Merging #113 (c08c5b8) into upgrade/cosmos46 (0c4b1ea) will decrease coverage by 2.49%.
The diff coverage is 10.71%.

@@                 Coverage Diff                  @@
##           upgrade/cosmos46     #113      +/-   ##
====================================================
- Coverage             70.38%   67.89%   -2.49%     
====================================================
  Files                     5        5              
  Lines                   709      732      +23     
====================================================
- Hits                    499      497       -2     
- Misses                  197      222      +25     
  Partials                 13       13              

Impacted Files	Coverage Δ
app/app.go	81.66% <10.71%> (-4.02%)	⬇️