New authentication UI

[klakhov]

Dependent on #5147
Resolved #5166

Motivation and context

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read github docs)
• I have increased versions of npm packages if it is necessary (cvat-canvas,
  cvat-core, cvat-data and cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[klakhov]

/check

[github-actions]

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[klakhov]

/check

[github-actions]

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[sizov-kirill]

@klakhov there is already not necessary to run full check workflow, all our tests are running in main workflow (as it was before full check)

[bsekachev]

Input field still tries to escape from the initial position when I entering something, it does not look well IMHO..

Please, look also how "Next" button goes out of the form and then returns back

[bsekachev]

Why can't we have a username with dots? They are allowed in django https://docs.djangoproject.com/en/4.1/ref/contrib/auth/#django.contrib.auth.models.User.username

[klakhov]

@bsekachev I belive It's better now (adjusted size a bit).