[Util] Add a command to print all system addresses

[turbolent]

Add a command similar to addresses, which prints the addresses of all system accounts, based on the information in the system contracts struct

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 25 lines in your changes missing coverage. Please review.

Project coverage is 41.99%. Comparing base (eeac479) to head (de32486).

Files	Patch %	Lines
cmd/util/cmd/system-addresses/cmd.go	0.00%	24 Missing ⚠️
cmd/util/cmd/root.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6339      +/-   ##
==========================================
+ Coverage   41.18%   41.99%   +0.80%     
==========================================
  Files        1629     1628       -1     
  Lines      121427   118552    -2875     
==========================================
- Hits        50010    49780     -230     
+ Misses      66180    63606    -2574     
+ Partials     5237     5166      -71     

Flag	Coverage Δ
unittests	41.99% <0.00%> (+0.80%)	⬆️

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[janezpodhostnik]

nice!