Remove reset() from PaymentSheet

[porter-stripe]

Summary

• Removed reset in favor of resetCustomer
• Don't see any mention of it in the docs

Motivation

https://docs.google.com/document/d/1DVnqjz5gLAP_JbjxZJ0Ptdv72hO0jTfreYx6_CdcGn0/edit?tab=t.0

Testing

• Compiler

Changelog

See diff

[github-actions]

⚠️ Public API changes detected:

StripePaymentSheet

- @available(*, deprecated, renamed: "resetCustomer()")
- public static func reset()

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• Do these APIs need to be public or can they be protected with @_spi(STP)?
• 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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