refactor(p2p): rename ConnectionsManager to P2PManager [part ?]

[glevco]

Depends on #1155

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 81.57895% with 14 lines in your changes missing coverage. Please review.

Please upload report for BASE (refactor/p2p/async-on-new-vertex@2c9988d). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
hathor/sysctl/p2p/manager.py	78.78%	5 Missing and 2 partials ⚠️
hathor/p2p/states/peer_id.py	40.00%	0 Missing and 3 partials ⚠️
hathor/builder/sysctl_builder.py	0.00%	1 Missing ⚠️
hathor/p2p/protocol.py	85.71%	0 Missing and 1 partial ⚠️
hathor/p2p/states/hello.py	50.00%	0 Missing and 1 partial ⚠️
hathor/p2p/states/ready.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@                         Coverage Diff                         @@
##             refactor/p2p/async-on-new-vertex    #1158   +/-   ##
===================================================================
  Coverage                                    ?   84.50%           
===================================================================
  Files                                       ?      321           
  Lines                                       ?    24461           
  Branches                                    ?     3743           
===================================================================
  Hits                                        ?    20670           
  Misses                                      ?     3071           
  Partials                                    ?      720           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.