## Description
Blocking disconnection of the only connected auth method in admin
settings to avoid locking out the user.
Fixes #`Issue Number`
_or_
Fixes `Issue URL`
> [!WARNING]
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._
## Automation
/ok-to-test tags="@tag.Settings, @tag.Authentication, @tag.SignIn"
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/14326343041>
> Commit: 1c158e140b141597640afd57ca0c3c72c74df194
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=14326343041&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Settings, @tag.Authentication, @tag.SignIn`
> Spec:
> <hr>Tue, 08 Apr 2025 06:31:56 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **Bug Fixes**
- Updated Google login handling to ensure the system now accurately
verifies when Google OAuth is enabled, improving the reliability of
authentication.
- Enhanced the categorization of test cases related to Form Login and
Google authentication, ensuring more precise test execution.
- **Refactor**
- Streamlined login settings management in the admin interface by
removing redundant state management, ensuring consistent and up-to-date
behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2d4acf37b6