feat(checker): Add poppler Checker

[BreadGenie]

Website: http://poppler.freedesktop.org/
CVEs:
https://www.cvedetails.com/product/6675/?q=Poppler
https://www.cvedetails.com/vulnerability-list/vendor_id-7971/product_id-24992/Freedesktop-Poppler.html

[codecov-commenter]

Codecov Report

Merging #1283 (ddf1253) into main (4449279) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1283      +/-   ##
==========================================
+ Coverage   80.74%   80.77%   +0.03%     
==========================================
  Files         252      254       +2     
  Lines        4564     4573       +9     
  Branches      557      557              
==========================================
+ Hits         3685     3694       +9     
  Misses        741      741              
  Partials      138      138              

Flag	Coverage Δ
longtests	80.77% <100.00%> (+0.03%)	⬆️

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

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