Do not try to publish proofs for malicious ATXs during sync

[ivan4th]

Motivation

Publishing is blocked during sync because Syncer::ListenToATXGossip() returns false, and thus every malicious ATX being synced is causing an error resulting in an interruption of sync.

Description

Do not try to publish ATX malfeasance proofs during sync.

Test Plan

Sync a test node, look for sync interruptions / errors

[codecov[bot]]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (0c4c55d) 79.6% compared to head (6c98cf4) 79.7%. Report is 4 commits behind head on develop.

Files	Patch %	Lines
activation/handler.go	78.1%	12 Missing and 2 partials :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #5586   +/-   ##
=======================================
  Coverage     79.6%   79.7%           
=======================================
  Files          270     270           
  Lines        27186   27199   +13     
=======================================
+ Hits         21667   21688   +21     
+ Misses        3973    3967    -6     
+ Partials      1546    1544    -2     

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[ivan4th]

bors try

[spacemesh-bors[bot]]

try

Build succeeded:

• ci-status
• systest-status

[dshulyak]

@ivan4th should we merge the change?

[ivan4th]

Yes, let's merge

[ivan4th]

bors merge

[spacemesh-bors[bot]]

Pull request successfully merged into develop.

Build succeeded:

• systest-status
• ci-status