[Merged by Bors] - use zap in genvm

[poszu]

Motivation

Part of the effort to migrate to zap.

Description

Test Plan

existing tests pass

TODO

• Explain motivation or link existing issue(s)
• Test changes and document test plan
• Update documentation as needed
• Update changelog as needed

[codecov]

Codecov Report

Attention: Patch coverage is 98.18182% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.1%. Comparing base (88ba729) to head (4682a03).
Report is 3 commits behind head on develop.

Files	Patch %	Lines
genvm/vm.go	97.5%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6236     +/-   ##
=========================================
- Coverage     82.1%   82.1%   -0.1%     
=========================================
  Files          308     308             
  Lines        34066   34067      +1     
=========================================
- Hits         27976   27975      -1     
- Misses        4314    4321      +7     
+ Partials      1776    1771      -5     

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[poszu]

bors merge

[spacemesh-bors]

Pull request successfully merged into develop.

Build succeeded:

• ci-status
• systest-status