Relax conditions on extensions flattening

[tefra]

📒 Description

The generator is flattening extensions when the subclass is overriding fields with diffrent types.

This part of the code is from the very first versions of xsdata and has a few major flaws like not walking the whole mro and not allowing overriding object overrides.

Resolves #738

🔗 What I've Done

• Remove that part of the code. It runs early in the flow and there are handlers down the pipleline that do much better job working with type conflicts.
• Harden the conditions that indicate field overrides to also include namespace and the actual xml type instead of just the tag name.
• Update compound field handler to allow overriding compound fields with different types (Same elements!!!)
• Update the default type for xs:attributes to xs:anySimpleType (to allow overriding safely from type==object)

💬 Comments

🛫 Checklist

• Updated docs
• Added unit-tests
• Sample tests pass
• W3C tests pass

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (fa51f61) compared to base (7d93ade).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #754   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          101       101           
  Lines         8828      8839   +11     
  Branches      1955      1958    +3     
=========================================
+ Hits          8828      8839   +11     

Impacted Files	Coverage Δ
...sdata/codegen/handlers/flatten_class_extensions.py	100.00% <ø> (ø)
xsdata/codegen/handlers/create_compound_fields.py	100.00% <100.00%> (ø)
...egen/handlers/sanitize_attributes_default_value.py	100.00% <100.00%> (ø)
.../codegen/handlers/validate_attributes_overrides.py	100.00% <100.00%> (ø)
xsdata/codegen/models.py	100.00% <100.00%> (ø)
xsdata/models/xsd.py	100.00% <100.00%> (ø)

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication