Test qcircuit with actual PDF output

[pavoljuhas]

• Change test_qcircuit_pdf to compile PDF file
• Install LaTeX and latexmk for the CI jobs

Prerequisite for tests in #7354

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.37%. Comparing base (b1f8b82) to head (f66e269).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7665      +/-   ##
==========================================
- Coverage   99.37%   99.37%   -0.01%     
==========================================
  Files        1082     1082              
  Lines       96691    96691              
==========================================
- Hits        96086    96084       -2     
- Misses        605      607       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[pavoljuhas]

NB: The installation of texlive adds about 1 minute to the duration of affected CI jobs.