[Woo POS] Replace product restrictions banner with a menu item

[joshheald]

Closes: WOOMOB-357

Description

This PR makes the product restrictions banner and modal (simple/variable products only) less prominent.

• Removes the banner from the ItemList
• Removes the i button from the header
• Adds a menu item to show the modal

Steps to reproduce

1. Delete the app to ensure you don't have the banner dismissal stored in user defaults
2. Build and run the app, then log in
3. Navigate to POS
4. Observe that the product restrictions banner is not shown, and nor is the i button
5. Tap the ... menu, then Where are my products?
6. Observe that the product restrictions modal is shown, and you can interact with it as you'd expect.

Testing information

Note that this allows the POS to be closed from new parts of the flow, by tapping Create order in store management. I've tested that payments are correctly cancelled if you do this while waiting for a customer to tap their card, and it can't be done during a card payment as the menu is inaccessible.

I've tested on an iPad Air running iOS 17.7.3, and a simulator running iOS 18.4

Screenshots

move.product.restrictions.banner.mp4

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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.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.

[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	29445
	Version	PR #15539
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	6cf7621
	Installation URL	0a5o6qg3o4d0g

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

[staskus]

Thanks for addressing this! Looks well. 👍