fix: do not double-create Stripe token in Apple Pay flow

[charliecruzan-stripe]

Motivation

fixes #1236

Testing

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• I added automated tests

Documentation

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[walkerdb]

Thanks for the fix! I think you'll also want to update the docs on Platform Pay Migration to no longer mention that createPlatformPayPaymentMethod returns a token

[mjvestal]

I tested these changes out locally and it solved the issue of using Apple Pay to create a platform payment method on a physical device for me.