fix: Mark body and fault as optional in output soap classes

[tefra]

📒 Description

The generator creates soap envelop classes where both body and fault are mandatory, they should both be optional

Resolves #1093

🔗 What I've Done

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💬 Comments

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🛫 Checklist

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

[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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.75%. Comparing base (95755fe) to head (31c22a5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##              main    #1099      +/-   ##
===========================================
- Coverage   100.00%   99.75%   -0.25%     
===========================================
  Files          115      115              
  Lines         9281     9283       +2     
  Branches      1418     1419       +1     
===========================================
- Hits          9281     9260      -21     
- Misses           0       19      +19     
- Partials         0        4       +4     

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