detect/var: Restrict var usage to single buffer

[jlucovsky]

Continuation of #13584

Issue: 1412

Extend the checks added for 7549 to include buffers.

Only consider sig matches with compatible ids/lists.

Link to ticket: https://redmine.openinfosecfoundation.org/issues/1412

Describe changes:

• Extend buffer/variable checks to buffers init data
• In strict-mode, do not load rules using variables from different buffers.
• When not in strict mode, issue warning for rules that use variables from different buffers.

Updates:

• Include behavioral change note (see detect/var: Restrict var usage to single buffer #13465) in upgrade notes.
• Doc format fixup (see detect/var: Restrict var usage to single buffer #13509 CI failures)
• s-v rebase
• Modified behavior when mult buffers are in use: Warning if not in strict mode, else error.
• Honor strict-rule-keywords
• Include issue number and file name in warning output.

Provide values to any of the below to override the defaults.

• To use a Suricata-Verify or Suricata-Update pull request,
  link to the pull request in the respective _BRANCH variable.
• Leave unused overrides blank or remove.

SV_REPO=
SV_BRANCH=OISF/suricata-verify#2576
SU_REPO=
SU_BRANCH=

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.70%. Comparing base (2e69e0d) to head (17da193).
⚠️ Report is 36 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #13622      +/-   ##
==========================================
+ Coverage   83.69%   83.70%   +0.01%     
==========================================
  Files        1011     1011              
  Lines      275071   275109      +38     
==========================================
+ Hits       230210   230276      +66     
+ Misses      44861    44833      -28     

Flag	Coverage Δ
fuzzcorpus	62.83% <96.15%> (+0.07%)	⬆️
livemode	19.14% <0.00%> (+0.02%)	⬆️
pcap	44.75% <38.46%> (+0.01%)	⬆️
suricata-verify	65.09% <94.87%> (-0.02%)	⬇️
unittests	59.19% <74.35%> (+<0.01%)	⬆️

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

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[suricata-qa]

Information: QA ran without warnings.

Pipeline = 27037

[catenacyber]

I wonder what we want to do now that 8.0.0 is out and this was not merged in it 😢

[jlucovsky]

Continued in #13716