Fix product variation selection for order creation

[adborbas]

Closes (WOOMOB-1611)[https://linear.app/a8c/issue/WOOMOB-1611]

Description

Fixes the linked issue by reusing the ProductSelectorNavigationView, which wraps the selector in a NavigationStack. Interestingly, the problem was sporadic, which I did not notice when I opened the ticket, and even more interestingly, it failed more often in the simulator than on the device. Either way, using the navigation stack, the issue is fixed; it just took me way too long to find the fix.

Test Steps

1. Start the app.
2. Open the order tab.
3. Tap the "+" icon in the nav bar.
4. Tap on "+ Add Products".
5. Tap on the product with variations.
6. Select a variation.
7. Note that you are NOT navigated back to the "Select products" screen.
8. Note that the variation is marked as selected.
9. Tap back.
10. Note that you see the product marked as selected.

Screenshots

Before	After

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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	pr16317-9b7759c
	Version	23.6
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	9b7759c
	Installation URL	72d6stc2hrhu0

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

[itsmeichigo]

Thanks for the fix!