feat(lbp): add simulation test

[Roznovjak]

Description

Implement a test simulating an LBP event

Related Issue

Fixes: #70

[codecov]

Codecov Report

Merging #160 (bd59140) into master (3275c17) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #160      +/-   ##
==========================================
- Coverage   85.39%   85.38%   -0.01%     
==========================================
  Files          21       21              
  Lines        2109     2108       -1     
==========================================
- Hits         1801     1800       -1     
  Misses        308      308              

Impacted Files	Coverage Δ
pallets/lbp/src/lib.rs	86.00% <100.00%> (-0.04%)	⬇️

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[Roznovjak]

@jak-pan @lumir-mrkva I have implemented a new test simulating an LBP event under the same conditions as the simulation from the google sheet. I have also created new sheet and updated the price calculation in the sheet because the old implementation was using weights from previous blocks. Differences between the results of the simulations are significant.

[Roznovjak]

I was able to reduce the difference between the test and the sheet to ~0.3%

[enthusiastmartin]

@Roznovjak perhaps it would be better to implement this as part of integration tests ? it uses basilisk-runtime so you'd be working with that instead of mocked runtime.
It is actually does not require changes in your test - only context which you run it in.

what do you think ?