feat(p2p): add setting to enable/disable peer whitelist for sync-v2

[jansegre]

Motivation

While sync-v2 is in beta it's better to keep using the whitelist until it is stable.

Acceptance Criteria

• Add a bool option to the settings to choose whether the peer whitelist should be considered for sync-v2 peers

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

Merging #735 (e710e6d) into master (91590c7) will decrease coverage by 0.09%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master     #735      +/-   ##
==========================================
- Coverage   84.52%   84.43%   -0.09%     
==========================================
  Files         251      251              
  Lines       21603    21607       +4     
  Branches     2921     2923       +2     
==========================================
- Hits        18259    18244      -15     
- Misses       2710     2724      +14     
- Partials      634      639       +5     

Files Changed	Coverage Δ
hathor/p2p/states/peer_id.py	71.11% <20.00%> (-2.46%)	⬇️
hathor/conf/settings.py	97.08% <100.00%> (+0.02%)	⬆️

... and 4 files with indirect coverage changes