feat(checker): libvncserver checker

[peb-peb]

Description

Added libvncserver checker

Checklist

• Add checker
• All tests passing
• black/isort tests are passing
• updated the template for this checker
• updated the reference links
• added condensed downloads

[codecov-commenter]

Codecov Report

Merging #1296 (eacded6) into main (281cd76) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1296      +/-   ##
==========================================
+ Coverage   80.35%   80.39%   +0.03%     
==========================================
  Files         264      266       +2     
  Lines        4810     4819       +9     
  Branches      578      578              
==========================================
+ Hits         3865     3874       +9     
  Misses        797      797              
  Partials      148      148              

Flag	Coverage Δ
longtests	80.39% <100.00%> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
cve_bin_tool/checkers/__init__.py	95.45% <ø> (ø)
cve_bin_tool/checkers/libvncserver.py	100.00% <100.00%> (ø)
test/test_data/libvncserver.py	100.00% <100.00%> (ø)

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[BreadGenie]

Do we really need 5 different packages to test?
Maybe I'm wrong but I think we only add more packages when the version strings are different in different versions or packages (like in systemd).
IMO adding couple packages with different packages and extensions is fine (maybe it's okay now that long tests take less time).

Offtopic: Glad to have you back here :D

[peb-peb]

Offtopic: Glad to have you back here :D

Thanks :D

I think that the 5 different packages would show that these packages are valid across all different distros, i.e., centos, fedora, debian, etc.

[terriko]

I like the different distros, but usually we try to also get some different versions at the same time (might as well prove as many things as possible per test). I'm going to go ahead and approve and merge this as is, but I'll open an issue to suggest that maybe we could swap a few versions in the future.

[peb-peb]

Please give your suggestions on if something else should be added in the template.

[BreadGenie]

maybe add a check for checker too (even though it's obvious) like in #1076 (my 1st contribution :D).

[terriko]

I like the different distros, but usually we try to also get some different versions at the same time (might as well prove as many things as possible per test). I'm going to go ahead and approve and merge this as is, but I'll open an issue to suggest that maybe we could swap a few versions in the future.