SHOP-1372: [Aura] Add the option to display the states as a drop-down list on the new themes

[eihabkhan1]

JIRA Ticket

SHOP-1372

QA Steps

• Go to /admin/settings/payment
• Define a custom field of type "select", make sure it's enabled
• Make sure you use the "Aura" theme
• In your storefront, go to a product page
• Open the express checkout form
• You should see the custom select field you defined rendered as a instead of
• Try to submit the form empty, if you have the field as required you should see an error (Note: The error might display a cryptic field name, that is a bug to be fixed in a separate PR)
• Fill out the form, and click submit.
• The form should submit and you should be directed to the thank you page
• Check your orders in /admin/orders, an order should be created

Note

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