Enable `Rails/ReversibleMigration` cop (#33264)

db/migrate/.rubocop.yml

@@ -3,12 +3,17 @@ inherit_from: ../../.rubocop.yml
 Naming/VariableNumber:
   CheckSymbols: false
 
-# Enabled here as workaround for https://docs.rubocop.org/rubocop/configuration.html#path-relativity
+# Below are all enabled as workaround for https://docs.rubocop.org/rubocop/configuration.html#path-relativity
+# TODO: Delete this file and move above config to base naming config
+
 Rails/CreateTableWithTimestamps:
   Include:
     - '*.rb'
 
-# Enabled here as workaround for https://docs.rubocop.org/rubocop/configuration.html#path-relativity
 Rails/ThreeStateBooleanColumn:
   Include:
     - '*.rb'
+
+Rails/ReversibleMigration:
+  Include:
+    - '*.rb'

db/migrate/20170205175257_remove_devices.rb

@@ -1,7 +1,11 @@
 # frozen_string_literal: true
 
 class RemoveDevices < ActiveRecord::Migration[5.0]
-  def change
+  def up
     drop_table :devices if table_exists?(:devices)
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end

db/migrate/20170711225116_fix_null_booleans.rb

@@ -3,10 +3,10 @@
 class FixNullBooleans < ActiveRecord::Migration[5.1]
   def change
     safety_assured do
-      change_column_default :domain_blocks, :reject_media, false
+      change_column_default :domain_blocks, :reject_media, false # rubocop:disable Rails/ReversibleMigration
       change_column_null :domain_blocks, :reject_media, false, false
 
-      change_column_default :imports, :approved, false
+      change_column_default :imports, :approved, false # rubocop:disable Rails/ReversibleMigration
       change_column_null :imports, :approved, false, false
 
       change_column_null :statuses, :sensitive, false, false
@@ -14,7 +14,7 @@ class FixNullBooleans < ActiveRecord::Migration[5.1]
 
       change_column_null :users, :admin, false, false
 
-      change_column_default :users, :otp_required_for_login, false
+      change_column_default :users, :otp_required_for_login, false # rubocop:disable Rails/ReversibleMigration
       change_column_null :users, :otp_required_for_login, false, false
     end
   end

db/migrate/20220827195229_change_canonical_email_blocks_nullable.rb

@@ -2,6 +2,6 @@
 
 class ChangeCanonicalEmailBlocksNullable < ActiveRecord::Migration[6.1]
   def change
-    safety_assured { change_column :canonical_email_blocks, :reference_account_id, :bigint, null: true, default: nil }
+    safety_assured { change_column :canonical_email_blocks, :reference_account_id, :bigint, null: true, default: nil } # rubocop:disable Rails/ReversibleMigration
   end
 end