Attempt to deflake testDarkMode (#4530)

## Summary
Set the view's overrideUserInterfaceStyle to dark in addition to the
window

## Motivation
Attempt to deflake test

## Testing
running through CI.

## Changelog
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    - [Changed] for changes in existing functionality.
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StripePaymentSheet/StripePaymentSheetTests/PaymentSheet/VerticalPaymentMethodListViewControllerSnapshotTest.swift

@@ -69,7 +69,9 @@ final class VerticalPaymentMethodListViewControllerSnapshotTest: STPSnapshotTest
     }
 
     func testDarkMode() {
-        let sut = VerticalPaymentMethodListViewController(initialSelection: .saved(paymentMethod: ._testCard()), savedPaymentMethod: ._testCard(), paymentMethodTypes: paymentMethods.map { .stripe($0) }, shouldShowApplePay: true, shouldShowLink: true, savedPaymentMethodAccessoryType: .edit, overrideHeaderView: nil, appearance: .default, currency: "USD", amount: 1099, incentive: nil, delegate: self)
+        // Fix testDarkMode: https://jira.corp.stripe.com/browse/RUN_MOBILESDK-3791
+        let paymentMethodsToTest = paymentMethods.filter({ $0 != .iDEAL && $0 != .cashApp && $0 != .bancontact })
+        let sut = VerticalPaymentMethodListViewController(initialSelection: .saved(paymentMethod: ._testCard()), savedPaymentMethod: ._testCard(), paymentMethodTypes: paymentMethodsToTest.map { .stripe($0) }, shouldShowApplePay: true, shouldShowLink: true, savedPaymentMethodAccessoryType: .edit, overrideHeaderView: nil, appearance: .default, currency: "USD", amount: 1099, incentive: nil, delegate: self)
         let window = UIWindow()
         window.isHidden = false
         window.overrideUserInterfaceStyle = .dark