fix(gnovm): show object updates using difflib, log blocks

[thehowl]

adds to #3893

changes logs from opslog so that when we're logging an update, we only log the updated lines

conditionally enables opslog based on whether the filetest needs it.

[Gno2D2]

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Codecov Report

Attention: Patch coverage is 87.50000% with 8 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
gnovm/pkg/gnolang/store.go	84.00%	6 Missing and 2 partials ⚠️

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