Add and apply rules for multi-line arrays

We were already applying these rules in most cases.

Note we aren't enabling the `MultilineArrayLineBreaks` rule because
we've got places with many elements whire it isn't clear whether
having one element per line would make the code more readable.

app/controllers/valuation/budget_investments_controller.rb

@@ -77,12 +77,12 @@ class Valuation::BudgetInvestmentsController < Valuation::BaseController
       investment_headings = Budget::Heading.where(id: investments.pluck(:heading_id)).sort_by(&:name)
 
       all_headings_filter = [
-                              {
-                                name: t("valuation.budget_investments.index.headings_filter_all"),
-                                id: nil,
-                                count: investments.size
-                              }
-                            ]
+        {
+          name: t("valuation.budget_investments.index.headings_filter_all"),
+          id: nil,
+          count: investments.size
+        }
+      ]
 
       investment_headings.reduce(all_headings_filter) do |filters, heading|
         filters << {