refactor: Separate Sync P2P server from P2P service

[infrmtcs]

Depends on #3136

[codecov]

Codecov Report

❌ Patch coverage is 47.15909% with 93 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (dat/detection@2663e4e). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
p2p/server/server.go	6.97%	40 Missing ⚠️
p2p/sync/client.go	0.00%	33 Missing ⚠️
p2p/p2p.go	53.84%	11 Missing and 1 partial ⚠️
p2p/dht/dht.go	63.63%	8 Missing ⚠️

❌ Your patch check has failed because the patch coverage (47.15%) is below the target coverage (60.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@               Coverage Diff                @@
##             dat/detection    #3172   +/-   ##
================================================
  Coverage                 ?   73.40%           
================================================
  Files                    ?      306           
  Lines                    ?    34955           
  Branches                 ?        0           
================================================
  Hits                     ?    25657           
  Misses                   ?     7652           
  Partials                 ?     1646           

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