Support Instant Debits with deferred intents

[tillh-stripe]

Summary

Motivation

Testing

Changelog

[github-actions]

🚨 New dead code detected in this PR:

FinancialConnectionsPaymentDetails.swift:11 warning: Protocol 'PaymentMethodIDProvider' is redundant as it's never used as an existential type
FinancialConnectionsPaymentDetails.swift:33 warning: Protocol 'PaymentMethodIDProvider' conformance is redundant
PaymentMethodFormViewController.swift:203 warning: Enum case 'instantDebitsDeferredIntentNotSupported' is unused

Please remove the dead code before merging.

If this is intentional, you can bypass this check by adding the label skip dead code check to this PR.

ℹ️ If this comment appears to be left in error, double check that the flagged code is actually used and/or make sure your branch is up-to-date with master.

[github-actions]

⚠️ Public API changes detected:

StripePaymentSheet

+ case invalidLinkBankPaymentMethod

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• If these APIs need to be public, assess whether they require an API review.

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• Does this require a breaking version change?
• Do these changes require API review?

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ℹ️ If this comment appears to be left in error, make sure your branch is up-to-date with master.

[tillh-stripe]

Added the modifies public API label to account for the new PaymentSheetError case. Let me know if that’s not fine.