Upgrade @metamask/gator-permissions-controller to version 3.0.0

A new major version of `@metamask/gator-permissions-controller`, 3.0.0, 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.

Locate the project dependency manifest and any lockfile entries for @metamask/gator-permissions-controller. If the package is present, update it to version 3.0.0, then run the repository's dependency validation or test commands; done means the upgrade is recorded and the project still passes validation.

Written by the indexing model from the issue text.