[Payments onboarding] Show the wp-admin URL for Payments Overview/Connect page in authenticated webview to skip login

[jaclync]

Ref: #14224 (comment)

❓ Question: Would it be worth to use WebViewSheet rather than SafariSheetView here? I haven't checked further but I think we can leverage the authenticated web view with the former.

Let's present the webview pre-authenticated whenever possible.

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.

[jaclync]

Re-opened now that the approach in #14252 did not work - Stripe "Add information" authentication issue: #14303

[jaclync]

The previous iOS issue from using the authenticated webview #14303 might be caused by the same issue as identified in the similar Android issue where the Stripe form doesn't load: woocommerce/woocommerce-android#12907

It looks like some time ago, the Stripe site started to open in a pop-up in a browser, and our authenticated web view doesn't support it on Android, so a user ends up in an endless loading state.

[staskus]

As a bonus, using authenticated one addresses issues such as:

• [Mobile Payments] Hide Woo app installation prompt from onboarding web views #14341

[staskus]

It's also important to note that we already use an authenticated web view from the dashboard's payments onboarding flow. So it likely has the same issue as Menu -> Payments flow had.