Add Security Keys support

[Ecarrion]

closes https://github.com/woocommerce/woocommerce-ios/issues/10859

Depends On

• https://github.com/wordpress-mobile/WordPressKit-iOS/pull/629

Merged Into

• https://github.com/wordpress-mobile/WordPressAuthenticator-iOS/pull/785
• https://github.com/wordpress-mobile/WordPressAuthenticator-iOS/pull/786
• https://github.com/wordpress-mobile/WordPressAuthenticator-iOS/pull/787
• https://github.com/wordpress-mobile/WordPressAuthenticator-iOS/pull/789

Implemented On

• https://github.com/woocommerce/woocommerce-ios/pull/10904
• https://github.com/wordpress-mobile/WordPress-iOS/pull/21739

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• [x] I have considered if this change warrants release notes and have added them to the appropriate section in the CHANGELOG.md if necessary.