Change user settings to be stored in a more optimal way (#23630)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

app/models/user_settings/glue.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module UserSettings::Glue
+  def to_model
+    self
+  end
+
+  def to_key
+    ''
+  end
+
+  def persisted?
+    false
+  end
+
+  def type_for_attribute(key)
+    self.class.definition_for(key)&.type
+  end
+
+  def has_attribute?(key) # rubocop:disable Naming/PredicateName
+    self.class.definition_for?(key)
+  end
+end