feat: scan memory, reset allocator

[petar-dambovaliev]

This is as an alternative solution to garbage collection to reclaim memory.
If an allocation is about to fail, walk all blocks in the machine and their values and recalculate how much memory is used.

This issue has been taken over by @ltzmaxwell .

[codecov]

Codecov Report

Attention: Patch coverage is 11.36364% with 39 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
gnovm/pkg/gnolang/alloc.go	2.50%	38 Missing and 1 partial ⚠️

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[petar-dambovaliev]

Pending @jaekwon's approval for this approach and i will add tests for this functionality.

[Gno2D2]

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[zivkovicmilos]

Logging here for visibility:
#3458

[Kouteki]

Stale, closing