refactor(p2p): remove builder methods from P2PManager [part ?]

[glevco]

Depends on #1158

Motivation

What was the motivation for the changes in this PR?

Acceptance Criteria

• Include here all things that this PR should solve

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

Attention: Patch coverage is 73.17073% with 11 lines in your changes missing coverage. Please review.

Project coverage is 84.54%. Comparing base (ae318ec) to head (63763de).

Files with missing lines	Patch %	Lines
hathor/p2p/p2p_manager.py	62.50%	4 Missing and 5 partials ⚠️
hathor/builder/cli_builder.py	50.00%	2 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##           refactor/p2p/renames    #1159      +/-   ##
========================================================
+ Coverage                 84.50%   84.54%   +0.03%     
========================================================
  Files                       321      321              
  Lines                     24461    24459       -2     
  Branches                   3743     3740       -3     
========================================================
+ Hits                      20670    20678       +8     
+ Misses                     3071     3064       -7     
+ Partials                    720      717       -3     

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