refactor: allow reuse of icmp/ping code in vizroute

[clambin]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 88.79056% with 38 lines in your changes missing coverage. Please review.

Project coverage is 85.93%. Comparing base (4dee77f) to head (eebf743).
Report is 2 commits behind head on master.

Files	Patch %	Lines
pkg/ping/icmp/icmp.go	86.90%	15 Missing and 7 partials ⚠️
pkg/ping/ping.go	81.70%	12 Missing and 3 partials ⚠️
internal/cmd/pinger.go	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #147      +/-   ##
==========================================
+ Coverage   76.87%   85.93%   +9.06%     
==========================================
  Files           7       11       +4     
  Lines         320      640     +320     
==========================================
+ Hits          246      550     +304     
- Misses         65       66       +1     
- Partials        9       24      +15     

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