fix: accept shippingDetails in klarna, return paymentMethod with intents

[charliecruzan-stripe]

Summary

Updates types for Klarna, and returns the full paymentMethod for all setup intents and payment intents (if one exists). This currently doesn't work as expected on android due to something in stripe-android, so that should be addressed before merging.

Testing

• I tested this manually
• I added automated tests

Documentation

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• This PR does not result in any developer-facing changes.