As of #23867 this is now a real package, so updating the imports to
use the real package name, rather than relying on the alias. The
name change in the package name is because `I18n` is not a valid
name as NPM packages must be all lowercase.
This commit also introduces an eslint rule to prevent importing from
the old I18n path.
For themes/plugins, the old 'i18n' name remains functional.
Regression from https://github.com/discourse/discourse/pull/23668 where we stopped passing in `this.badgeReason` to the badge granting function. This PR fixes that and adds a unit test to cover that code path.
* DEV: upgrade grant badge modal to glimmer
* DEV: add unit tests for grant badge utils
* DEV: replace grant-badge-controller mixin with grant-badge-utils in admin-user-badges controller
* DEV: remove GrantBadgeController mixin
Moving the `grantBadge` action out of the actions hash caused it to clash with a method of the same name from the GrantBadgeController mixin. This commit renames the action.