[BANKCON-14534] Add expected_payment_method_type to /confirm params

[mats-stripe]

Summary

As part of the Panther project, this passes the expected_payment_method_type param to the /confirm payment endpoint after going through the instant debits flow.

Motivation

BANKCON-14534

Testing

E2E tests coming soon. Verified the parameter is passed to the /confirm endpoint:

Changelog

N/a

[github-actions]

🚨 New dead code detected in this PR:

{
  "FinancialConnectionsAPIClient.swift_sharePaymentDetails(consumerSessionClientSecret:paymentDetailsId:expectedPaymentMethodType:)": "FinancialConnectionsAPIClient.swift: warning: sharePaymentDetails(consumerSessionClientSecret:paymentDetailsId:expectedPaymentMethodType:) is unused",
  "EmptyFinancialConnectionsAPIClient.swift_sharePaymentDetails(consumerSessionClientSecret:paymentDetailsId:expectedPaymentMethodType:)": "EmptyFinancialConnectionsAPIClient.swift: warning: sharePaymentDetails(consumerSessionClientSecret:paymentDetailsId:expectedPaymentMethodType:) 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.

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The base branch was changed.