fix: show stripe credit card fields after update

[mikejhale]

Bug Report

User Story

As an admin, I want credit stripe credit card fields to show after updating so that I can continue to accept donations without having to change the donation flow on my site.

Current Behavior

After updating, Stripe Credit Card fields will not display on the donation form.

Expected Behavior

Stripe Credit Card fields show after update

Bug Type

• This bug describes functionality that once worked as expected in version 2.5.4

Steps to Reproduce

This is a fairly edge case, but under the following circumstances Stripe fields won't show up on the page on the latest:

1. Using the API Key method to connect
2. Using Stripe Checkout modal on an older version of Core/Stripe addon.
3. Update to 2.5.8 of core and 2.2.2 of Stripe Premium
4. The credit card fields won't show up, no matter what.

Visuals

A detailed explanation and steps to reproduce are here:
https://screencast-o-matic.com/watch/cq6jYQu331

Related

Probably related to #4260

https://give.productboard.com/inbox/features/3056649/detail

Acceptance Criteria

• Credit Card form fields are displayed after upgrade
• Donation is successfully made using Stripe Credit Card