Libhtp rs v27.2 small step for src

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/
https://redmine.openinfosecfoundation.org/issues/2696

Describe changes:

• prepare libhtp-rs by minimizing the diff for src subdir

This allow to go one small step further

#12474 next round

git diff libhtp-rs-v27 --name-only -- src/ gives

• src/Makefile.am : remove libhtp.h 🟢
• src/app-layer-htp-libhtp.c : removal 🟢
• src/app-layer-htp-libhtp.h : removal 🟢
• src/app-layer-htp.c : many changes as expected, and to be worked upon in a next PR 🚧
• src/app-layer-htp.h : changes will remain until the final PR I think 🟢
• src/detect-http-headers-stub.h : removal of libhtp.h 🟢
• src/detect-http-host.c : I do not see a better migration path for parsed uri
• src/detect-http-protocol.c : #ifdef removed 🟢
• src/detect-http-uri.c : I do not see a better migration path for parsed uri
• src/suricata.c : #ifdef removed and only one libhtp version 🟢
• src/util-lua-http.c : I do not see a better migration path for parsed uri

[codecov]

Codecov Report

Attention: Patch coverage is 52.00000% with 24 lines in your changes missing coverage. Please review.

Project coverage is 80.57%. Comparing base (cfbf8fd) to head (1abee61).
Report is 21 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12509      +/-   ##
==========================================
+ Coverage   80.56%   80.57%   +0.01%     
==========================================
  Files         925      925              
  Lines      259292   259282      -10     
==========================================
+ Hits       208906   208926      +20     
+ Misses      50386    50356      -30     

Flag	Coverage Δ
fuzzcorpus	56.14% <17.64%> (-0.01%)	⬇️
livemode	19.39% <0.00%> (+<0.01%)	⬆️
pcap	44.23% <0.00%> (+0.03%)	⬆️
suricata-verify	63.39% <20.58%> (+<0.01%)	⬆️
unittests	58.44% <32.00%> (-0.01%)	⬇️

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

[victorjulien]

Merged in #12514, thanks!