Ticket#5583->util/misc: Change shortening format and add unittests V4

[jhonny-rs]

Ticket: #5583

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• I have read the contributing guide lines at
  https://docs.suricata.io/en/latest/devguide/contributing/contribution-process.html

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Changes (if applicable):

• I have created a ticket at
  https://redmine.openinfosecfoundation.org/projects/suricata/issues

Link to ticket: https://redmine.openinfosecfoundation.org/issues/5583

Describe changes:

• Change the iface shortening format and adding unittests to the ShortenString function.

[codecov]

Codecov Report

❌ Patch coverage is 97.43590% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 84.17%. Comparing base (b21c93d) to head (99a60d9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14326   +/-   ##
=======================================
  Coverage   84.16%   84.17%           
=======================================
  Files        1012     1012           
  Lines      261869   261900   +31     
=======================================
+ Hits       220405   220444   +39     
+ Misses      41464    41456    -8     

Flag	Coverage Δ
fuzzcorpus	63.31% <80.00%> (-0.01%)	⬇️
livemode	18.74% <0.00%> (-0.03%)	⬇️
pcap	44.63% <0.00%> (-0.06%)	⬇️
suricata-verify	64.93% <0.00%> (+0.01%)	⬆️
unittests	59.23% <97.43%> (+<0.01%)	⬆️

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[victorjulien]

Something went wrong while handling git, as the commit is now owned by dependabot :)

[jhonny-rs]

Something went wrong while handling git, as the commit is now owned by dependabot :)

I must have missed that, just fixed it in #14327