Do not redirect when requiring verification and experiment is made inactive

When the user_details.requires_credit_card_verification attribute is set to true (this will happen during sign up at the time the require_verification_for_namespace_creation experiment is active), do not require verification anymore when the experiment is made inactive again, as this will cause the user to get stuck on to the /users/sign_up/groups_projects/new page.

Issue: https://gitlab.com/gitlab-com/support/internal-requests/-/issues/14383