Sign In Buttons no longer visible in v2.34.0

## Bug description

After upgrading to version 2.34.0, the sign in buttons are no longer visible on the `/signin` page.

The `div` has the class `hidden` in 2.34.0, while it didn't have this class in `2.33.0`.

Seems related to https://github.com/Azure/api-management-developer-portal/pull/2845

Reverting back to 2.33.0 resolves the issue

## Reproduction steps

1. Go to 'https://portal/signin'
4. See no signin buttons

## Expected behavior

The sign in button is visible.

## Is self-hosted portal?

Yes
## Release tag or commit SHA (if using self-hosted version)

release `2.34.0`

## API Management service name

[e.g., contoso-api]

## Environment

- Operating system: Windows
- Browser: Edge
- Version: 147

## Additional context

Add any other context about the problem here, including screenshots.

Start at the /signin page and compare the 2.34.0 behavior with 2.33.0, then inspect the changes from pull request 2845 that affect the hidden div. Reproduce the issue on a self-hosted portal and verify that the sign-in buttons are visible in release 2.34.0 without regressing the expected sign-in behavior.

Written by the indexing model from the issue text.