[IMP] Support Odoo 18 + 19 + auto skip HttpCase without --odoo-http + subtests + test integration

[petrus-v]

Add integration test with real odoo setup.

based on

• Fix support to subTest context manager for odoo >= 16.0 #86
• [IMP] Change imports #89
• Alternative of Add per-worker HTTP port support for parallel test execution #91

•  support Odoo 19
• subTests
• integration test
• --odoo-http support forOdoo 18
• --odoo-http support forOdoo 19
• Test that inherit from HttpCase are skipped until we use --odoo-http in command line

[codecov-commenter]

Codecov Report

❌ Patch coverage is 76.92308% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.98%. Comparing base (76c36a7) to head (b860c01).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
pytest_odoo.py	76.92%	9 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #93       +/-   ##
===========================================
+ Coverage   34.92%   68.98%   +34.06%     
===========================================
  Files           1        1               
  Lines         126      158       +32     
===========================================
+ Hits           44      109       +65     
+ Misses         82       49       -33     

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[msjtheriault]

I can't test everything this PR does, but I can confirm it fixes the odoo 19 import problem.