detect/mqtt: reason_code keyword is now a multi-integer

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/
https://redmine.openinfosecfoundation.org/issues/7929

Describe changes:

• detect/mqtt: reason_code keyword is now a multi-integer

Draft to get feedback :
The current detect_uint_match_at_index uses a Vec
Here for mqtt.reason_code, we do not have a Vec ready, because we have a Vector of Vector of u8...
So, proposal is to build a Vec<u8> and keep old code if detect index is any

Other keywords have the same pattern :

• enip.cip_attribute (array of arrays)
• enip.cip_class (array of arrays)
• enip.cip_status (array of arrays)
• enip.cip_instance (array of arrays)
• enip.cip_extendedstatus (array of arrays)

[codecov]

Codecov Report

❌ Patch coverage is 21.87500% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.20%. Comparing base (c61f1cb) to head (61a1348).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14274      +/-   ##
==========================================
- Coverage   84.21%   84.20%   -0.02%     
==========================================
  Files        1013     1013              
  Lines      262126   262152      +26     
==========================================
- Hits       220752   220739      -13     
- Misses      41374    41413      +39     

Flag	Coverage Δ
fuzzcorpus	63.32% <21.87%> (-0.01%)	⬇️
livemode	18.70% <0.00%> (-0.02%)	⬇️
pcap	44.56% <0.00%> (-0.04%)	⬇️
suricata-verify	64.89% <21.87%> (+<0.01%)	⬆️
unittests	59.23% <0.00%> (+<0.01%)	⬆️

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[suricata-qa]

Information: QA ran without warnings.

Pipeline = 28325