Merge branch 'backup_restore_skip' into 'master'

Allow restore tasks to be skipped using SKIP

See merge request gitlab-org/gitlab!83783

lib/backup/manager.rb

@@ -389,6 +389,7 @@ module Backup
     end
 
     def skipped?(item)
+      ENV.fetch('SKIP', '').include?(item) ||
         backup_information[:skipped] && backup_information[:skipped].include?(item)
     end
 

spec/lib/backup/manager_spec.rb

@@ -228,6 +228,20 @@ RSpec.describe Backup::Manager do
       end
     end
 
+    context 'when SKIP env is set' do
+      let(:expected_backup_contents) { %w{backup_information.yml task1.tar.gz} }
+
+      before do
+        stub_env('SKIP', 'task2')
+      end
+
+      it 'executes tar' do
+        subject.create # rubocop:disable Rails/SaveBang
+
+        expect(Kernel).to have_received(:system).with(*tar_cmdline)
+      end
+    end
+
     context 'when the destination is optional' do
       let(:expected_backup_contents) { %w{backup_information.yml task1.tar.gz} }
       let(:definitions) do