Disallow methods that copy data on large tables

{change_column_type,rename_column}_concurrently both copy data from one column
to another during a migration, which should not be done on GitLab.com. Instead,
we should use background migrations.

rubocop/cop/migration/update_large_table.rb

@@ -34,8 +34,15 @@ module RuboCop
           users
         ].freeze
 
+        BATCH_UPDATE_METHODS = %w[
+          :add_column_with_default
+          :change_column_type_concurrently
+          :rename_column_concurrently
+          :update_column_in_batches
+        ].join(' ').freeze
+
         def_node_matcher :batch_update?, <<~PATTERN
-          (send nil? ${:add_column_with_default :update_column_in_batches} $(sym ...) ...)
+          (send nil? ${#{BATCH_UPDATE_METHODS}} $(sym ...) ...)
         PATTERN
 
         def on_send(node)

spec/rubocop/cop/migration/update_large_table_spec.rb

@@ -32,6 +32,14 @@ describe RuboCop::Cop::Migration::UpdateLargeTable do
       include_examples 'large tables', 'add_column_with_default'
     end
 
+    context 'for the change_column_type_concurrently method' do
+      include_examples 'large tables', 'change_column_type_concurrently'
+    end
+
+    context 'for the rename_column_concurrently method' do
+      include_examples 'large tables', 'rename_column_concurrently'
+    end
+
     context 'for the update_column_in_batches method' do
       include_examples 'large tables', 'update_column_in_batches'
     end
@@ -60,6 +68,18 @@ describe RuboCop::Cop::Migration::UpdateLargeTable do
       expect(cop.offenses).to be_empty
     end
 
+    it 'registers no offense for change_column_type_concurrently' do
+      inspect_source("change_column_type_concurrently :#{table}, :column, default: true")
+
+      expect(cop.offenses).to be_empty
+    end
+
+    it 'registers no offense for update_column_in_batches' do
+      inspect_source("rename_column_concurrently :#{table}, :column, default: true")
+
+      expect(cop.offenses).to be_empty
+    end
+
     it 'registers no offense for update_column_in_batches' do
       inspect_source("add_column_with_default :#{table}, :column, default: true")