http: prepare libhtp.rs aliases for htp opaque htp_tx_t

[catenacyber]

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

Describe changes:

• prepare libhtp-rs by defining aliases for the new values used by libhtp-rs

This allow to go one small step further

The big libhtp-rs commit will remove app-layer-htp-libhtp.h which defines these aliases

#12407 next round

[codecov]

Codecov Report

Attention: Patch coverage is 79.14110% with 68 lines in your changes missing coverage. Please review.

Project coverage is 80.64%. Comparing base (8f6795d) to head (23050d7).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #12419   +/-   ##
=======================================
  Coverage   80.63%   80.64%           
=======================================
  Files         918      918           
  Lines      258696   258712   +16     
=======================================
+ Hits       208598   208636   +38     
+ Misses      50098    50076   -22     

Flag	Coverage Δ
fuzzcorpus	56.81% <66.39%> (+<0.01%)	⬆️
livemode	19.40% <0.00%> (-0.01%)	⬇️
pcap	44.31% <55.06%> (+<0.01%)	⬆️
suricata-verify	63.26% <68.01%> (+0.02%)	⬆️
unittests	58.52% <42.02%> (-0.01%)	⬇️

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[suricata-qa]

Information: QA ran without warnings.

Pipeline 24251