Update StripeTerminal to 4.7.3

[joshheald]

Description

This is a speculative fix for a rare crash which I can't reproduce, and an important update to keep our Stripe dependency current.

There's a v5, but it has breaking changes, so we'll tackle that separately.

Test Steps

Test payments with a card reader and tap to pay.
I've tested using Chipper, M2, WisePad 3, and TTP.

I found an unrelated issue where Interac refunds in Canada seem to fail. This is pre-existing and I'll work on it in another ticket.

Note that I found there was a strange issue where Tap to Pay wasn't offered. This was because the incorrect enum raw value was used for DeviceType when detectign support, resulting in the device being marked as not supporting tap to pay because it had looked for an internet reader instead, and got an error from Stripe Terminal. A clean build fixed this, so it seems to be related to leftover build artefacts.

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• 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	pr16467-854c7a6
	Version	23.8
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	854c7a6
	Installation URL	1i9ctn3vg76lg

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

[joshheald]

@iamgabrielma Just a bump on this one in case you missed it...

[iamgabrielma]

@iamgabrielma Just a bump on this one in case you missed it...

Thanks! I did miss it 🙇

[iamgabrielma]

LGTM!

Tested in US store using M2 reader, both card and TTP, using iPhone 14 on iOS 18.7.2

I've logged as well a task in linear to plan the bump to 5.0