tests: fixes to e2e test logs parsers

[algorandskiy]

Summary

1. Fix agreement-log.py to support e2e test output without libgoalFixture.go string prefix
2. Add topology-extract-ws-e2e.py similar to topology-extract-[ws|p2p].py for e2e test network mapping

Test Plan

These are debugging tools, tested manually on this TestTotalWeightChanges log

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.26%. Comparing base (d2c4ca7) to head (2892bc6).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6093   +/-   ##
=======================================
  Coverage   56.26%   56.26%           
=======================================
  Files         489      489           
  Lines       69637    69637           
=======================================
+ Hits        39182    39183    +1     
+ Misses      27796    27795    -1     
  Partials     2659     2659           

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[jasonpaulos]

Looks good but one suggestion to keep the