Replace Preneeds Virtus Models with POROs

[stevenjcumming]

Summary

• Update Preneeds::Base to remove virtus
  • set all Preneeds models back to Preneeds::Base
• re-implement Virtus's basic features in Preneeds::Base
  • this should have a minimal impact on the subclasses
• spec/requests/v0/preneeds/burial_forms_spec.rb had a mistake when instantiating Preneeds::BurialForm and I fixed that

Related issue(s)

• Remove Virtus models for Preneeds va.gov-team#92438

Testing done

• n/a

Acceptance criteria

• Preneeds::Base doesn't use virtus gem
• Preneeds::VirtusBase is removed

Reviewer Feedback

A class instance variable (@attributes) is used to aggregate the attributes listed in the subclass. Rubocop suggested referencing it in a class method this could be a thread safety concern.

However, I think because the value of @attributes is based on the subclass implementation and therefore the same for ever thread there shouldn't be a thread safety concern. @attributes is effectively immutable because it's based on the the attributes listed in the file.

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Error: A file (or its parent directories) was deleted but its reference still exists in CODEOWNERS. Please update the .github/CODEOWNERS file and delete the entry for the Offending file:

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Error: A file (or its parent directories) does not have a CODEOWNERS entry. Please update the .github/CODEOWNERS file and add the entry for the Offending file:

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Error: A file (or its parent directories) does not have a CODEOWNERS entry. Please update the .github/CODEOWNERS file and add the entry for the Offending file:

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Error: A file (or its parent directories) was deleted but its reference still exists in CODEOWNERS. Please update the .github/CODEOWNERS file and delete the entry for the Offending file:

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Error: A file (or its parent directories) does not have a CODEOWNERS entry. Please update the .github/CODEOWNERS file and add the entry for the Offending file: config/initializers/core_extensions.rb

[github-actions]

Backend-review-group approval confirmed.