Use URL interface to validate URI

[WunderBart]

Description

Replacing valid-url package with the whatwg-url (because IE11) for creating a URI validator. The polyfill is a better choice IMO, as it's much more versatile and later on (once we drop IE11 support) we could easily switch to the native implementation.

How has this been tested?

Screenshots

Types of changes

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR. .

[WunderBart]

Closing in favor of #19871.