Upgrade @metamask/gator-permissions-controller to version 2.0.0

A new major version of `@metamask/gator-permissions-controller`, 2.0.0, is now available. This issue has been assigned to you and your team because you code-own this package in the `core` repo. If this package is present in this project, please prioritize upgrading it soon to unblock new features and bugfixes.

Start by locating the dependency manifest and references to @metamask/gator-permissions-controller, then inspect the currently declared version and how the package is used. Done means the project uses version 2.0.0 where applicable and the relevant project checks pass.

Written by the indexing model from the issue text.