Output alert applayer v25

[catenacyber]

Link to redmine tickets:
https://redmine.openinfosecfoundation.org/issues/3827
Preliminary work for https://redmine.openinfosecfoundation.org/issues/5053

Describe changes:

• output: unify boilerplate code (trying to become a lines-of-code neutral contributor to Suricata ;-) and rising the percentage of rust files )
• output/dns: do not add empty app-layer metadata
• dnp3: restrict function scope to one file

#10548 with needed rebase after header files changes, still removed

[codecov]

Codecov Report

Attention: Patch coverage is 98.26087% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 82.70%. Comparing base (59d18b9) to head (6019357).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10631      +/-   ##
==========================================
- Coverage   82.75%   82.70%   -0.05%     
==========================================
  Files         925      913      -12     
  Lines      247551   247203     -348     
==========================================
- Hits       204852   204459     -393     
- Misses      42699    42744      +45     

Flag	Coverage Δ
fuzzcorpus	64.07% <81.73%> (+0.02%)	⬆️
suricata-verify	61.87% <98.26%> (-0.03%)	⬇️
unittests	62.29% <41.73%> (+0.08%)	⬆️

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

[suricata-qa]

Information:

ERROR: QA failed on SURI_TLPW2_autofp_suri_time.

ERROR: QA failed on SURI_TLPR1_suri_time.

field	baseline	test	%
	SURI_TLPW2_autofp_stats_chk
.uptime	138	148	107.25%
	SURI_TLPR1_stats_chk
.uptime	638	680	106.58%

Pipeline 19297

[catenacyber]

Rebased in #10680