DEV: Move UserApiKey scopes to dedicated table (#10704)

This has no functional impact yet, but it is the first step in adding more granular scopes to UserApiKeys

app/services/post_alerter.rb

@@ -470,7 +470,8 @@ class PostAlerter
 
     if SiteSetting.allow_user_api_key_scopes.split("|").include?("push") && SiteSetting.allowed_user_api_push_urls.present?
       clients = user.user_api_keys
-        .where("('push' = ANY(scopes) OR 'notifications' = ANY(scopes))")
+        .joins(:scopes)
+        .where("user_api_key_scopes.name IN ('push', 'notifications')")
         .where("push_url IS NOT NULL AND push_url <> ''")
         .where("position(push_url IN ?) > 0", SiteSetting.allowed_user_api_push_urls)
         .where("revoked_at IS NULL")