Move BillingDetails model to StripeCore module, and pass to ElementsSessionContext

[mats-stripe]

Summary

Motivation

Testing

Changelog

[github-actions]

🚨 New dead code detected in this PR:

FinancialConnectionsAPIClient.swift:236 warning: Function 'sharePaymentDetails(consumerSessionClientSecret:paymentDetailsId:expectedPaymentMethodType:billingDetails:)' is unused
FinancialConnectionsAPIClient.swift:243 warning: Function 'paymentMethods(consumerSessionClientSecret:paymentDetailsId:billingDetails:)' 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:

StripeCore

- public struct BillingDetails : StripeCore.UnknownFieldsCodable {
- public var address: StripeCore.StripeAPI.BillingDetails.Address?
- public struct Address : StripeCore.UnknownFieldsCodable {
- public var line1: Swift.String?
- public var line2: Swift.String?
- public var city: Swift.String?
- public var state: Swift.String?
- public var postalCode: Swift.String?
- public var country: Swift.String?
- public var _additionalParametersStorage: StripeCore.NonEncodableParameters?
- public var _allResponseFieldsStorage: StripeCore.NonEncodableParameters?
- public init(line1: Swift.String? = nil, line2: Swift.String? = nil, city: Swift.String? = nil, state: Swift.String? = nil, postalCode: Swift.String? = nil, country: Swift.String? = nil)
- public func encode(to encoder: any Swift.Encoder) throws
- public init(from decoder: any Swift.Decoder) throws
+ }
- public var email: Swift.String?
- public var name: Swift.String?
- public var phone: Swift.String?
- public var _additionalParametersStorage: StripeCore.NonEncodableParameters?
- public var _allResponseFieldsStorage: StripeCore.NonEncodableParameters?
- public init(address: StripeCore.StripeAPI.BillingDetails.Address? = nil, email: Swift.String? = nil, name: Swift.String? = nil, phone: Swift.String? = nil)
- public func encode(to encoder: any Swift.Encoder) throws
- public init(from decoder: any Swift.Decoder) throws
+ }

StripeApplePay

- public struct BillingDetails : StripeCore.UnknownFieldsCodable {
- public var address: StripeCore.StripeAPI.BillingDetails.Address?
- public struct Address : StripeCore.UnknownFieldsCodable {
- public var line1: Swift.String?
- public var line2: Swift.String?
- public var city: Swift.String?
- public var state: Swift.String?
- public var postalCode: Swift.String?
- public var country: Swift.String?
- public var _additionalParametersStorage: StripeCore.NonEncodableParameters?
- public var _allResponseFieldsStorage: StripeCore.NonEncodableParameters?
- public func encode(to encoder: any Swift.Encoder) throws
- public init(from decoder: any Swift.Decoder) throws
- }
- public var email: Swift.String?
- public var name: Swift.String?
- public var phone: Swift.String?
- public var _additionalParametersStorage: StripeCore.NonEncodableParameters?
- public var _allResponseFieldsStorage: StripeCore.NonEncodableParameters?
- public func encode(to encoder: any Swift.Encoder) throws
- public init(from decoder: any Swift.Decoder) throws
- }

If you are adding a new public API consider the following:

• 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.

If you are modifying or removing a public API:

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

If you confirm these APIs need to be added/updated and have undergone necessary review, add the label modifies public API to this PR to acknowledge and bypass this check.

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

[mats-stripe]

https://docs.stripe.com/api/payment_methods/create#create_payment_method-billing_details