Add superfluid flow test

[mattverse]

Closes: #XXX

Description

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

[mattverse]

Note to reviewers: this test is mostly integrations of tests for different components

[codecov-commenter]

Codecov Report

Merging #911 (54cb217) into main (a904b86) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #911      +/-   ##
==========================================
+ Coverage   20.32%   20.35%   +0.03%     
==========================================
  Files         192      192              
  Lines       24907    24907              
==========================================
+ Hits         5062     5071       +9     
+ Misses      18918    18911       -7     
+ Partials      927      925       -2     

Impacted Files	Coverage Δ
x/superfluid/keeper/hooks.go	44.44% <0.00%> (+5.55%)	⬆️
x/superfluid/keeper/epoch.go	80.00% <0.00%> (+13.33%)	⬆️
x/superfluid/keeper/superfluid_asset.go	100.00% <0.00%> (+50.00%)	⬆️

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[mattverse]

Updated test so that it uses app.BeginBlock, app.EndBlock, app.Commit

[mattverse]

Closing in favor of #1070