wp-cli: detect user roles added/removed

[bonny]

This was added in wp-cli 2.10.0. Since we recently added support for multiple roles in the GUI this makes a nice addition to that.

https://make.wordpress.org/cli/2024/02/08/wp-cli-v2-10-0-release-notes/

Support for adding and removing of multiple user roles
The two commands user add-role and user remove-role are now less lazy and can accept > multiple roles to add or remove for a given user. You can make this work by simply adding > as many roles as needed as separate arguments.

$ wp user add-role 12 author editor

Success: Added 'author', 'editor' roles for johndoe (12).

$ wp user remove-role 12 author editor

Success: Removed 'author', 'editor' roles for johndoe (12).

[bonny]

Done: