features: add UNIX_SOCKET feature

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/
https://redmine.openinfosecfoundation.org/issues/3464

Describe changes:

• define feature UNIX_SOCKET if compiled in

SV_BRANCH=OISF/suricata-verify#2836

#14473 just rebased to run new SV PR

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.13%. Comparing base (a53ba4a) to head (e2285bf).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14493      +/-   ##
==========================================
+ Coverage   82.11%   82.13%   +0.02%     
==========================================
  Files        1013     1013              
  Lines      262322   262325       +3     
==========================================
+ Hits       215408   215471      +63     
+ Misses      46914    46854      -60     

Flag	Coverage Δ
fuzzcorpus	59.30% <0.00%> (+<0.01%)	⬆️
livemode	18.91% <0.00%> (+0.03%)	⬆️
pcap	44.69% <0.00%> (+0.05%)	⬆️
suricata-verify	65.28% <0.00%> (+0.28%)	⬆️
unittests	59.26% <0.00%> (-0.01%)	⬇️

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[suricata-qa]

Information: QA ran without warnings.

Pipeline = 28772

[jasonish]

Make sense to have this.

[catenacyber]

Make sense to have this.

Thanks Jason, but the main PR is the SV one here ;-) could you look at it and approve it if ok ?

[victorjulien]

Passed my QA. Ran this PR with SV PR OISF/suricata-verify#2818. Local pipeline 6051, run 1158.