[iOS SDK] Update E2E tests for Email OTP MFA for EC Implementation

[spetrescu84]

Proposed changes

Updated E2E tests for Email OTP MFA for EC Implementation. The test test_signInUsingPasswordWithMFANoDefaultAuthMethod_completeSuccessfully was removed as it was incorrect since the user has to specify a method now.

Type of change

• Feature work
• Bug fix
• Documentation
• Engineering change
• Test
• Logging/Telemetry

Risk

• High – Errors could cause MAJOR regression of many scenarios. (Example: new large features or high level infrastructure changes)
• Medium – Errors could cause regression of 1 or more scenarios. (Example: somewhat complex bug fixes, small new features)
• Small – No issues are expected. (Example: Very small bug fixes, string changes, or configuration settings changes)

Additional information

[Copilot]

Pull Request Overview

This PR updates the iOS SDK's Email OTP MFA implementation for Enhanced Connect (EC) by changing the API to require explicit authentication method selection rather than allowing automatic defaults. The key changes streamline the MFA flow by removing the separate auth method retrieval step and integrating auth methods directly into the awaiting MFA state.

• Removed getAuthMethods functionality and related components as users must now specify auth methods explicitly
• Updated MFA request challenge APIs to require MSALAuthMethod parameter instead of optional
• Modified sign-in delegates to automatically provide auth methods when transitioning to MFA state

Reviewed Changes

Copilot reviewed 33 out of 33 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
MSAL/src/native_auth/public/state_machine/state/MFAStates.swift	Removed getAuthMethods method and made authMethod parameter required in requestChallenge
MSAL/src/native_auth/public/state_machine/delegate/SignInDelegates.swift	Updated delegate methods to include auth methods parameter
MSAL/src/native_auth/controllers/sign_in/MSALNativeAuthSignInController.swift	Integrated auth method retrieval into token response handling and updated grant types
MSAL/test/integration/native_auth/end_to_end/mfa/MSALNativeAuthSignInWithMFAEndToEndTests.swift	Updated tests to use new API pattern and removed obsolete test cases
Multiple test files	Updated unit tests to reflect API changes and removed tests for deprecated functionality

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[Copilot]

The variable type annotation was changed from [MFAGetAuthMethodsError] to [MFARequestChallengeError] but this appears to be a correction rather than an error, as the test method name and context suggest it should be testing MFARequestChallengeError. However, verify that this change aligns with the intended test behavior.

[Copilot]

The struct name has a typo: 'SingInUsernameAndPasswordResult' should be 'SignInUsernameAndPasswordResult'.