[dotnet] Move .NET bindings to use new Typescript atoms for isShown,g…

[AutomatedTester]

…etAttribute,

and relative locators

🔗 Related Issues

💥 What does this PR do?

🔧 Implementation Notes

🤖 AI assistance

• No substantial AI assistance used
• AI assisted (complete below)
  • Tool(s):
  • What was generated:
  • I reviewed all AI output and can explain the change

💡 Additional Considerations

🔄 Types of changes

• Cleanup (formatting, renaming)
• Bug fix (backwards compatible)
• New feature (non-breaking change which adds functionality and tests!)
• Breaking change (fix or feature that would cause existing functionality to change)