[WCiOS17] Address some CardReader warnings

[iamgabrielma]

Part of WOOMOB-1003, but not specifically from iOS17

Description

This PR addresses suppressing warnings around PaymentMethod+Stripe and CardReaderSettingsSearchingViewModel:

• Stripe has expanded SCPPaymentMethodDetails to accept SCPPaymentMethodTypeWechatPay and SCPPaymentMethodTypeAffirm, which we handle explicitly as unknown since are not supported.
• CardReaderSettingsSearchingViewModel was not using the result of CardPresentPaymentAction.loadActivePaymentGatewayExtension() which thrown a warning, upon testing I realized that there was a bug with the learn more URL where we were always loading TTP learn more documentation. So we:
  • Update the default to IPP URL: 83a04d2
  • Assign the variable so we provide the correct URL on switching preferred payment method: e5f1ab1

Testing information

• In Settings > Payments > Payment Provider, select WCPay or Stripe
• Go to Manage Card Reader and dismiss the connection flow
• Tap Learn More, and observe the URL for IPP is correct and redirects to the specific payment gateway page
• Repeat by switching to a different payment provider

---

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce iOS Prototype by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce iOS Prototype
	Build Number	pr15998-7516d5d
	Version	23.0
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	7516d5d
	Installation URL	6g3qd01nfvpso

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[joshheald]

Works well, thanks