[ Documentation request ] Temporal Cloud - Add documentation on how to remove users downgrade/upgrade their roles

[antmendoza]

Brief description

The documentation mentions how to invite users to Temporal Cloud. (https://docs.temporal.io/cloud/how-to-get-started-with-temporal-cloud#invite-users-using-web-ui), it would be nice to have similar documentation on how to remove users from Temporal Cloud and how to downgrade/upgrade their roles

Your recommended content

Ad section "Manage users", similar to "Manage namespaces"