Fix unit batch height issue

[hallazzang]

Description

Modify batch execution logic to run deterministic when params.unitBatchHeight is not 1
Currently, unitBatchHeight counting has been underway since some Batch Msg entered each batch

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• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #346 (219eb78) into develop (fce1add) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #346      +/-   ##
===========================================
+ Coverage    83.21%   83.26%   +0.05%     
===========================================
  Files           20       20              
  Lines         2240     2247       +7     
===========================================
+ Hits          1864     1871       +7     
  Misses         207      207              
  Partials       169      169              

Impacted Files	Coverage Δ
x/liquidity/keeper/batch.go	86.36% <100.00%> (ø)
x/liquidity/keeper/liquidity_pool.go	79.60% <100.00%> (+0.03%)	⬆️
x/liquidity/keeper/swap.go	87.09% <100.00%> (+1.38%)	⬆️

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