Add configuration for using CTAO sonarqube to check code

[maxnoe]

Testing sonarqube with the src layout and not changing to a tmp dir

[maxnoe]

mmh, still no luck:

INFO: Parsing report '/github/workspace/coverage.xml'
ERROR: Cannot resolve the file path 'src/ctapipe/__init__.py' of the coverage report, the file does not exist in all 'source'.
ERROR: Cannot resolve 244 file paths, ignoring coverage measures for those files

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.58%. Comparing base (163b543) to head (c3cb18b).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2463      +/-   ##
==========================================
+ Coverage   92.53%   92.58%   +0.05%     
==========================================
  Files         235      232       -3     
  Lines       20063    20031      -32     
==========================================
- Hits        18565    18546      -19     
+ Misses       1498     1485      -13     

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[maxnoe]

I briefly activated also push builds on pull requests to get a full report on sonarqube, not just the Pull Request diff checks, works now:

https://sonar-cta-dpps.zeuthen.desy.de/dashboard?id=ctapipe_github_9404f0f6-9294-11ed-bf3b-07aa00bdfe94&branch=sonarqube_src

[maxnoe]

@kosack The direction github → Sonarqube works now. For the other direction we need to setup a Github app and configuration on the sonarqube server I think, but this is good to go