Resolve compound fields issues with multi-inheritance types

[tefra]

The netex collection once again is putting some of the xsdata codegen features to the test with cases I have never encountered before.

• Process choices default values with enumerations
• Evaluate choices when clearing inner classes as well
• Evaluate choice's forward references with the correct globals (clusters structure only)
• Holy grail multiple compound fields
• Delay the execution of some post-flattening handlers
• Refactor restrictions handling (min/max occurs, required, prohibited)
• Update the samples repo unit tests to generate code with multiple scenarios

Resolve #532 issues
Samples repo related pr tefra/xsdata-samples#60

[codecov]

Codecov Report

Merging #533 (4a5245a) into master (fb30305) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #533   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           95        94    -1     
  Lines         7664      7685   +21     
  Branches      1326      1327    +1     
=========================================
+ Hits          7664      7685   +21     

Impacted Files	Coverage Δ
xsdata/codegen/handlers/__init__.py	100.00% <ø> (ø)
xsdata/codegen/mappers/definitions.py	100.00% <ø> (ø)
xsdata/codegen/container.py	100.00% <100.00%> (ø)
...data/codegen/handlers/attribute_compound_choice.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_default_value.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_name_conflict.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_overrides.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/attribute_type.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/class_inners.py	100.00% <100.00%> (ø)
xsdata/codegen/mixins.py	100.00% <100.00%> (ø)
... and 6 more

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[tefra]

The reshuffle of the handlers is throwing stuff of out order for restrictions...

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

No Coverage information
0.0% Duplication