Improve: automatically remove prefix from scenario env vars

[Guts]

This PR:

• automatically remove QDT_ prefix from scenario settings name
• log about it
• global improvement of scenario reader regarding the dev guidelines
• add missing recognized settings to JSON schemas
• add a pattern to prevent end-user write a setting with the QDT_ prefix

[codecov]

Codecov Report

Attention: Patch coverage is 46.42857% with 15 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
qgis_deployment_toolbelt/commands/deployment.py	33.33%	4 Missing and 4 partials ⚠️
...s_deployment_toolbelt/scenarios/scenario_reader.py	56.25%	4 Missing and 3 partials ⚠️

@@            Coverage Diff             @@
##             main     #605      +/-   ##
==========================================
- Coverage   70.26%   70.00%   -0.27%     
==========================================
  Files          47       47              
  Lines        3192     3204      +12     
  Branches      560      566       +6     
==========================================
  Hits         2243     2243              
- Misses        749      755       +6     
- Partials      200      206       +6     

Flag	Coverage Δ
unittests	69.44% <46.42%> (-0.27%)	⬇️

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

Files with missing lines	Coverage Δ
...s_deployment_toolbelt/scenarios/scenario_reader.py	54.54% <56.25%> (-5.46%)	⬇️
qgis_deployment_toolbelt/commands/deployment.py	64.86% <33.33%> (-5.73%)	⬇️

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[jmkerloch]

Good idea, this will avoid some confusion with environment variable.

[Guts]

Pour tes étrennes @NROLLANDGrandlyon 😉

[NROLLANDGrandlyon]

Thanks guys !