fuzz: forbid usage of pcre with \X

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/8634

Describe changes:

• fuzz: forbid usage of pcre with \X

Do you want more ?
Like a warning if we are not fuzzing ?

[victorjulien]

I would like a warning or note in the engine analyzer, but that can be a follow up task/PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.92%. Comparing base (28b10fb) to head (0b4eae3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15651      +/-   ##
==========================================
+ Coverage   82.90%   82.92%   +0.01%     
==========================================
  Files        1006     1006              
  Lines      273648   273658      +10     
==========================================
+ Hits       226869   226920      +51     
+ Misses      46779    46738      -41     

Flag	Coverage Δ
fuzzcorpus	61.39% <100.00%> (+0.03%)	⬆️
livemode	18.44% <ø> (+0.01%)	⬆️
netns	22.80% <ø> (-0.03%)	⬇️
pcap	45.20% <ø> (-0.03%)	⬇️
suricata-verify	66.67% <ø> (-0.05%)	⬇️
unittests	58.53% <ø> (ø)

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[suricata-qa]

Information: QA ran without warnings.

Pipeline = 32048

[victorjulien]

Merged in #15659, thanks!

[catenacyber]

I would like a warning or note in the engine analyzer, but that can be a follow up task/PR.

Done in #15661