GitLab 16.10-ee login screen is white instead of black when using dark mode

Summary

In GitLab 16.10.1, dark mode isn't being applied on the login screen(/users/sign_in). After logging in, the theme works as intended. This behavior works as expected in Gitlab 16.9

Steps to reproduce

1. Install GitLab 16.10.1
2. In gitlab.rb enable the dark theme gitlab_rails['gitlab_default_theme'] = "11"
3. Go to your Instance URL, you will see that the login screen has a white background.

What is the current bug behavior?

In 16.10.1-ee the login screen shows a white background when dark theme is enabled.

What is the expected correct behavior?

A dark background is expected on the login screen.