feat: load packages lazily

[petar-dambovaliev]

Closes 3564

[Gno2D2]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 28 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
gnovm/pkg/gnolang/machine.go	0.00%	28 Missing ⚠️

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[thehowl]

Just a quick note: the problem with this is that nodes which are restarted have a different set of packages in the cache compared to ones which have been running with a cache; consequently, loading a DB from the store needs to happen with a clean gas meter.

I would also suggest that the best solution is one that keeps packages in the store using a cache, so that the amount of packages kept in the store is actually bounded to a specific amount

[petar-dambovaliev]

I am thinking about alternative implementations because the one in the PR seems to have issues with persistence. I'll keep this in mind whether i continue with this or go in a different direction.