feat: Ability to update avatars from super admin (#7264)

- Ability to update user avatars from super admin
- Ability to update bot avatars from super admin

fixes: #7060

config/routes.rb

@@ -399,10 +399,15 @@ Rails.application.routes.draw do
         post :seed, on: :member
         post :reset_cache, on: :member
       end
-      resources :users, only: [:index, :new, :create, :show, :edit, :update, :destroy]
+      resources :users, only: [:index, :new, :create, :show, :edit, :update, :destroy] do
+        delete :avatar, on: :member, action: :destroy_avatar
+      end
+
       resources :access_tokens, only: [:index, :show]
       resources :installation_configs, only: [:index, :new, :create, :show, :edit, :update]
-      resources :agent_bots, only: [:index, :new, :create, :show, :edit, :update]
+      resources :agent_bots, only: [:index, :new, :create, :show, :edit, :update] do
+        delete :avatar, on: :member, action: :destroy_avatar
+      end
       resources :platform_apps, only: [:index, :new, :create, :show, :edit, :update]
       resource :instance_status, only: [:show]