Failing test and future fix of issue #10912

[johnsonjo4531]

See #10912

For now I created a failing test for the new
version of React Native's linking api.
This test ensures that the listeners are cleaned
up properly using the remove method of the new subscription
based Linking.addEventListener function.
The old api is outlined as deprecated here:
https://github.com/facebook/react-native/blob/main/CHANGELOG-pre-070.md#deprecated-2 I am also planning on submitting the
bug-fix soon.

With the fix I assume the new API of
React-Native is all that would work for
future versions of react-router-native if
that's not what react-router
maintainers want this then you may want
to take a different approach than the code
below and the bug-fix I will create soon,
but if it is what react-router wants
then we will just need to update two
lines in react-router-native/index.tsx

In this function:

export function useDeepLinking() {
  // ... code elided for brevity ...

  // Listen for URL changes
  React.useEffect(() => {
    // ... code elided ...

    Linking.addEventListener(URLEventType, handleURLChange);

    return () => {
      Linking.removeEventListener(URLEventType, handleURLChange);
    };
  }, [navigate]);
}

From this:

    Linking.addEventListener(URLEventType, handleURLChange);

    return () => {
      Linking.removeEventListener(URLEventType, handleURLChange);
    };

To this:

    const subscription = Linking.addEventListener(URLEventType, handleURLChange);

    return () => {
      subscription.remove();
    };

This change will pass the tests.

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[johnsonjo4531]

Unsure how I should do the changeset and semver for this change. I could use a little direction. Thanks.