test: script improvements for recent testing

[brianolson]

Summary

script improvements from recent testing.
data gathering. reporting. plotting.

Test Plan

This is manual test code that has been exercised in dozens of manual tests.

[codecov]

Codecov Report

Merging #4474 (489237c) into master (9e4e84c) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4474      +/-   ##
==========================================
- Coverage   55.23%   55.23%   -0.01%     
==========================================
  Files         398      398              
  Lines       50297    50297              
==========================================
- Hits        27784    27781       -3     
- Misses      20180    20184       +4     
+ Partials     2333     2332       -1     

Impacted Files	Coverage Δ
ledger/tracker.go	74.04% <0.00%> (-4.69%)	⬇️
util/db/dbutil.go	44.24% <0.00%> (-4.25%)	⬇️
ledger/blockqueue.go	85.63% <0.00%> (-2.88%)	⬇️
ledger/acctupdates.go	69.59% <0.00%> (-0.60%)	⬇️
data/transactions/verify/txn.go	43.75% <0.00%> (ø)
network/wsNetwork.go	64.82% <0.00%> (+0.19%)	⬆️
catchup/service.go	68.88% <0.00%> (+0.74%)	⬆️
cmd/tealdbg/debugger.go	73.49% <0.00%> (+0.80%)	⬆️
catchup/peerSelector.go	100.00% <0.00%> (+1.04%)	⬆️
crypto/merkletrie/node.go	93.48% <0.00%> (+1.86%)	⬆️
... and 2 more

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[algorandskiy]

Please add into a readme a new section explaining new tools. I guess something like "to collect cpu profiles and render charts do: xyz" would be fine.