fix: regenerate variables map to allow selection on all supported collections

[blotus]

This is a follow-up on #1143.

I somehow managed to not commit the latest version of the auto-generated internal/variables/variablesmap.gen.go file, which broke some rules (for example, SecRule FILES:foo ... is currently refused but should work).

This PR:

• Updates the file
• Add a new CI job that will run go generate and return an error if there's any changes
• Add tests in the seclang parser for each collection (I auto-generated those as it's quite tedious, but they should be properly testing each collection)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.36%. Comparing base (e19151c) to head (e667f84).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1371      +/-   ##
==========================================
+ Coverage   83.84%   84.36%   +0.51%     
==========================================
  Files         170      170              
  Lines        9909     9925      +16     
==========================================
+ Hits         8308     8373      +65     
+ Misses       1357     1308      -49     
  Partials      244      244              

Flag	Coverage Δ
coraza.rule.case_sensitive_args_keys	84.32% <100.00%> (+0.51%)	⬆️
coraza.rule.multiphase_evaluation	84.02% <100.00%> (+0.52%)	⬆️
coraza.rule.no_regex_multiline	84.30% <100.00%> (+0.51%)	⬆️
default	84.36% <100.00%> (+0.51%)	⬆️
examples+	16.29% <0.00%> (-0.03%)	⬇️
examples+coraza.rule.case_sensitive_args_keys	84.32% <100.00%> (+0.51%)	⬆️
examples+coraza.rule.multiphase_evaluation	83.86% <100.00%> (+0.52%)	⬆️
examples+coraza.rule.no_regex_multiline	84.22% <100.00%> (+0.51%)	⬆️
examples+memoize_builders	84.33% <100.00%> (+0.52%)	⬆️
examples+no_fs_access	81.70% <100.00%> (+0.60%)	⬆️
ftw	84.36% <100.00%> (+0.51%)	⬆️
memoize_builders	84.46% <100.00%> (+0.52%)	⬆️
no_fs_access	83.86% <100.00%> (+0.52%)	⬆️
tinygo	84.33% <100.00%> (+0.52%)	⬆️

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[M4tteoP]

LGTM, I had to rebase to fix a conflict