fuzz/conf: bail out on long sequence of scalars

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/
https://redmine.openinfosecfoundation.org/issues/8108

Describe changes:

• backport of fuzz/conf: bail out on long sequence of scalars #14316, conflict easy to fix (SC prefix added in 8)

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.49%. Comparing base (3e1f76a) to head (900ed28).

Additional details and impacted files

@@             Coverage Diff             @@
##           main-7.0.x   #14341   +/-   ##
===========================================
  Coverage       81.49%   81.49%           
===========================================
  Files             925      925           
  Lines          252483   252491    +8     
===========================================
+ Hits           205759   205766    +7     
- Misses          46724    46725    +1     

Flag	Coverage Δ
fuzzcorpus	61.76% <87.50%> (+<0.01%)	⬆️
suricata-verify	63.56% <ø> (-0.01%)	⬇️
unittests	62.18% <ø> (-0.01%)	⬇️

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[suricata-qa]

Information: QA ran without warnings.

Pipeline = 28472