feat!: remove deprecated client, auth, and user methods

[ctran88]

BEGIN_COMMIT_OVERRIDE
feat!: remove deprecated client, auth, and user methods
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What's New?

• removes deprecated methods, helpers, and constants
• adds guard clause to create_magic_link_with_user method
• adds guard clauses to main client constructor
• addresses ignored linter issues
• updates tests to use new signatures
• removes inapplicable tests

Screenshots (if appropriate):

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have manually tested my code thoroughly
• I have added/updated inline documentation for public facing interfaces if relevant
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing integration and unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Additional context

[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