Run pending builds clean up migration in dev and test envs too

db/post_migrate/20210525075724_clean_up_pending_builds_table.rb

@@ -6,7 +6,7 @@ class CleanUpPendingBuildsTable < ActiveRecord::Migration[6.0]
   disable_ddl_transaction!
 
   def up
-    return unless Gitlab.com?
+    return unless Gitlab.dev_or_test_env? || Gitlab.com?
 
     each_batch('ci_pending_builds', of: BATCH_SIZE) do |min, max|
       execute <<~SQL

spec/migrations/clean_up_pending_builds_table_spec.rb

@@ -10,8 +10,6 @@ RSpec.describe CleanUpPendingBuildsTable do
   let(:builds) { table(:ci_builds) }
 
   before do
-    allow(Gitlab).to receive(:com?).and_return(true)
-
     namespaces.create!(id: 123, name: 'sample', path: 'sample')
     projects.create!(id: 123, name: 'sample', path: 'sample', namespace_id: 123)