Add coverage for StatusTrend and PreviewCardTrend models, add locales class method to RankedTrend (#32688)

spec/fabricators/preview_card_trend_fabricator.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Fabricator(:preview_card_trend) do
+  preview_card
+end

spec/fabricators/status_trend_fabricator.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+Fabricator(:status_trend) do
+  status
+  account
+end