[Merged by Bors] - use zap in timesync

[poszu]

Motivation

Part of the effort to migrate to zap.

Description

• migrated timesync/ to zap
• removed redundant error structs, which existed to have custom logging, but it was never used

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 87.87879% with 4 lines in your changes missing coverage. Please review.

Project coverage is 81.9%. Comparing base (f46277b) to head (ebae449).
Report is 1 commits behind head on develop.

Files	Patch %	Lines
timesync/peersync/sync.go	87.5%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6195     +/-   ##
=========================================
+ Coverage     81.8%   81.9%   +0.1%     
=========================================
  Files          302     300      -2     
  Lines        32539   32393    -146     
=========================================
- Hits         26631   26546     -85     
+ Misses        4180    4126     -54     
+ Partials      1728    1721      -7     

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[poszu]

bors merge

[spacemesh-bors]

Pull request successfully merged into develop.

Build succeeded:

• ci-status
• systest-status