Remove top padding from wrapper element

[stevehobbsdev]

Changes

This PR removes some slight top padding from the top of the form wrapper, which
has an effect on any error message panels that are being shown.

The removal of the padding doesn't affect the UI too badly so I've decided to
just remove it.

Without error

With error

References

Fixes #1933

Testing

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled
• All active GitHub checks have passed