[Merged by Bors] - Malfeasance2 fetcher and sync

[fasmat]

Motivation

This adds the necessary fetcher code for malfeasance v2 so that the node can sync new malfeasance proofs.

Closes #6689

Description

Initially legacy malfeasance proofs will continue to be managed and synced as before and malfeasance v2 proofs work independently of them. Which means everywhere in the codebase where we check for malicious identities we need to check for both identities.IsMalicious (v1) and malfeasance.IsMalicious (v2). Legacy malfeasance proofs will be migrated to v2 at a later point together with deprecating the legacy malfeasance protocol.

Test Plan

• Tests were added for new code
• Existing tests were updated/extended where necessary
• The Malfeasance systest was updated to check for a v2 malfeasance proof

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 74.71264% with 198 lines in your changes missing coverage. Please review.

Project coverage is 79.8%. Comparing base (19bd73d) to head (fcea6a0).
Report is 1 commits behind head on develop.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
syncer/malsync/syncer.go	75.4%	44 Missing and 12 partials ⚠️
malfeasance2/publisher.go	67.8%	33 Missing and 11 partials ⚠️
activation/handler_v2.go	76.0%	17 Missing ⚠️
fetch/mesh_data.go	76.9%	8 Missing and 4 partials ⚠️
fetch/handler.go	81.0%	7 Missing and 4 partials ⚠️
activation/handler_v1.go	43.7%	6 Missing and 3 partials ⚠️
malfeasance2/handler.go	59.0%	6 Missing and 3 partials ⚠️
activation/wire/malfeasance_double_merge.go	52.9%	4 Missing and 4 partials ⚠️
activation/wire/malfeasance_invalid_prev_atx.go	22.2%	5 Missing and 2 partials ⚠️
activation/wire/malfeasance_double_marry.go	28.5%	3 Missing and 2 partials ⚠️
... and 8 more

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6652     +/-   ##
=========================================
- Coverage     79.8%   79.8%   -0.1%     
=========================================
  Files          366     366             
  Lines        49517   49967    +450     
=========================================
+ Hits         39564   39886    +322     
- Misses        7711    7811    +100     
- Partials      2242    2270     +28     

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[fasmat]

bors try

[spacemesh-bors]

try

Build failed:

• ci-status

[fasmat]

bors try

[spacemesh-bors]

try

Build failed:

• ci-status

[fasmat]

bors try

[spacemesh-bors]

try

Build failed:

• systest-status

[fasmat]

bors merge

[spacemesh-bors]

Build failed:

• systest-status

[fasmat]

bors merge

[spacemesh-bors]

Build failed:

• ci-status

[fasmat]

flaky unit test on windows

bors merge

[spacemesh-bors]

Build failed:

• ci-status

[fasmat]

bors merge

[spacemesh-bors]

Pull request successfully merged into develop.

Build succeeded:

• systest-status
• ci-status