PTHMINT-75: Remove unsupported attribute in docs (delivery)

[zulquer]

This pull request removes several fields and their associated methods from the Delivery class in the src/multisafepay/api/shared/delivery.py file, along with corresponding test cases in the tests/multisafepay/unit/api/shared/test_unit_delivery.py file. The removed fields include street_name, street_name_additional, house_number_suffix, and country_name.

Changes to the Delivery class:

• Removed the fields street_name, street_name_additional, house_number_suffix, and country_name from the Delivery class definition. [1] [2]
• Deleted methods for adding these fields (add_street_name, add_street_name_additional, add_house_number_suffix, and add_country_name).

Changes to test cases:

• Updated the test_initializes_with_valid_values and test_initializes_with_default_values tests to remove assertions related to the deleted fields. [1] [2] [3]
• Removed specific test cases for the deleted fields, such as test_adds_street_name, test_adds_street_name_additional, and test_adds_house_number_suffix.
• Updated the test_creates_from_dict_with_all_fields and test_creates_from_empty_dict tests to remove references to the deleted fields. [1] [2] [3]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.42%. Comparing base (446bd2c) to head (c7ebf0e).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #24      +/-   ##
==========================================
+ Coverage   90.40%   90.42%   +0.02%     
==========================================
  Files         106      106              
  Lines        2323     2307      -16     
==========================================
- Hits         2100     2086      -14     
+ Misses        223      221       -2     

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