DEV: Update `/admin/badges` to modern Ember patterns (#17672)
* Nest admin badges controller and route files
* Use standard file names for admin-badges
* Update resolver to allow standardized file structure for admin
* Add adminBadges.index controller for property tracking
* Modernize admin badges controller
* Modernize admin-badges route
* Add admin-badges index route
* Modernize admin-badges.show controller and route
* Modernize admin-badges.award controller and route
* Convert BadgeButton to a Glimmer component
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