detect/transforms: in place modifications of buffers

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/
https://redmine.openinfosecfoundation.org/issues/7409

Describe changes:

• detect/transforms: fix and test in place modifications of buffers (aka do not use memcpy)

#12194 with commit reworded

[codecov]

Codecov Report

Attention: Patch coverage is 98.86364% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.18%. Comparing base (ae10fc3) to head (d205e59).
Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12200      +/-   ##
==========================================
+ Coverage   83.16%   83.18%   +0.01%     
==========================================
  Files         912      912              
  Lines      257066   257124      +58     
==========================================
+ Hits       213797   213878      +81     
+ Misses      43269    43246      -23     

Flag	Coverage Δ
fuzzcorpus	61.01% <72.72%> (+0.03%)	⬆️
livemode	19.41% <0.00%> (-0.01%)	⬇️
pcap	44.41% <24.24%> (-0.01%)	⬇️
suricata-verify	62.78% <90.90%> (+0.07%)	⬆️
unittests	59.18% <93.18%> (+<0.01%)	⬆️

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

[suricata-qa]

WARNING:

field	baseline	test	%
	SURI_TLPR1_stats_chk
.http.byterange.memuse	99602115	103910094	104.33%

Pipeline 23628

[victorjulien]

Merged in #12213, thanks!