[native] Reduce indentation of LoggedOutModal

Summary:
As a first step towards replacing the Reanimated 1 syntax in LoggedOutModal with Reanimated 2 syntax (ENG-8146), I'm converting the class component to a function component.

By moving the React.memo wrapper to the end, we're able to reduce the indentation.

This is the final diff in the LoggedOutModal -> function component refactor!

Depends on D12197

Test Plan:
I tested this diff stack by playing around with LoggedOutModal on my iOS simulator in my local environment:

1. I navigated to LogInPanel and back
2. I navigated to LegacyRegisterPanel and back
3. I navigated to FullscreenSIWEPanel and back
4. I navigated to QRCodeSignInNavigator and back
5. I navigated to Registration and back

Reviewers: inka

Reviewed By: inka

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D12198