Move constants to params

[alpe]

🚧 WIP

Resolves #202

In Params now:

• GasMultiplier
• InstanceCost
• CompileCost

NOTE: the changes come with a significant increase in gas costs (in our test setup). The work is on hold for >0.10

TODO:

• move other constants
• proper tests

[codecov]

Codecov Report

Merging #235 into master will decrease coverage by 0.05%.
The diff coverage is 85.24%.

@@            Coverage Diff             @@
##           master     #235      +/-   ##
==========================================
- Coverage   72.34%   72.28%   -0.06%     
==========================================
  Files          27       27              
  Lines        2632     2659      +27     
==========================================
+ Hits         1904     1922      +18     
- Misses        616      623       +7     
- Partials      112      114       +2     

Impacted Files	Coverage Δ
x/wasm/internal/types/params.go	54.54% <30.00%> (-3.15%)	⬇️
x/wasm/internal/keeper/api.go	85.71% <91.66%> (+14.28%)	⬆️
x/wasm/internal/keeper/keeper.go	90.86% <97.43%> (-0.83%)	⬇️
lcd_test/helpers.go	75.71% <0.00%> (+0.71%)	⬆️

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[ethanfrey]

I would leave this on hold for a bit to think if we want to. The gas costs are an interesting factor (5x reads?)

It would need to be for 0.11 in any case.

[ethanfrey]

Nice idea. Let's not do this for 1.0. Maybe 2.0

[ethanfrey]

Do not delete branch