Add promo badge for incentives in MPE

[tillh-stripe]

Summary

Motivation

Testing

Changelog

[github-actions]

🚨 New dead code detected in this PR:

PaymentMethodTypeCollectionView.swift:90 warning: Function 'setIncentive(_:)' is unused
PaymentMethodIncentive.swift:16 warning: Initializer 'init(identifier:text:)' is unused
VerticalPaymentMethodListViewController.swift:28 warning: Property 'incentive' is assigned, but never used

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.

[emerge-tools]

📸 Snapshot Test

No snapshots generated

Name	Added	Removed	Modified	Unchanged	Errored	Approval
StripeApplePaySize com.stripe.StripeApplePaySize	0	0	0	0	0	N/A
StripePaymentSheetSize com.stripe.StripePaymentSheetSize	0	0	0	0	0	N/A
StripeFinancialConnectionsSize com.stripe.StripeFinancialConnectionsSize	0	0	0	0	0	N/A
StripeSize com.stripe.StripeSize	0	0	0	0	0	N/A
StripePaymentsSize com.stripe.StripePaymentsSize	0	0	0	0	0	N/A
StripePaymentsUISize com.stripe.StripePaymentsUISize	0	0	0	0	0	N/A

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