detect: unify multi-buffer code

[catenacyber]

Link to redmine ticket: https://redmine.openinfosecfoundation.org/issues/6575

Describe changes:

• detect: unify multi-buffer code

#10462 with needed rebase

Preliminary work for #10334

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 78.81773% with 43 lines in your changes are missing coverage. Please review.

Project coverage is 82.82%. Comparing base (2b4e102) to head (5ad8f27).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10897      +/-   ##
==========================================
+ Coverage   77.64%   82.82%   +5.18%     
==========================================
  Files         922      922              
  Lines      247806   247265     -541     
==========================================
+ Hits       192400   204807   +12407     
+ Misses      55406    42458   -12948     

Flag	Coverage Δ
fuzzcorpus	64.25% <78.81%> (?)
suricata-verify	62.30% <76.84%> (-0.13%)	:arrow_down:
unittests	62.29% <59.60%> (+0.09%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

[suricata-qa]

ERROR:

ERROR: QA failed on SURI_TLPW1_files_sha256.

Pipeline 20227

[catenacyber]

Rebased in https://github.com/OISF/suricata/pull/11028