chore(share/p2p/peers): Change namings inside discovery

[renaynay]

Discovery can be used for different kinds of nodes (soon archival) so let's rename to avoid confusion in future.

[Wondertan]

✈️ 💧 🧑‍🌾 PR

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 45.83333% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 52.51%. Comparing base (1809680) to head (a011093).
Report is 8 commits behind head on main.

Files	Patch %	Lines
share/p2p/peers/manager.go	57.89%	7 Missing and 1 partial ⚠️
share/p2p/discovery/discovery.go	0.00%	2 Missing ⚠️
share/p2p/peers/metrics.go	0.00%	2 Missing ⚠️
nodebuilder/share/constructors.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3191      +/-   ##
==========================================
+ Coverage   51.92%   52.51%   +0.58%     
==========================================
  Files         178      178              
  Lines       11316     9318    -1998     
==========================================
- Hits         5876     4893     -983     
+ Misses       4942     3919    -1023     
- Partials      498      506       +8     

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