fix(gnovm): optimize parameter-setting logic

[ltzmaxwell]

remove duplicate logic, see comments in files.

[Gno2D2]

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[codecov]

Codecov Report

❌ Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
gno.land/pkg/sdk/vm/builtins.go	85.71%	1 Missing ⚠️

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[ltzmaxwell]

duplicate with what happens in tm2/pkg/sdk/params/keeper.go