Move Qrtly Reconciliation files back

They were moved to a wrong place - under the admin folder
but we show this alert for namespace owners too.

ee/app/assets/javascripts/admin/qrtly_reconciliation_alert/init_qrtly_reconciliation_alert.js → ee/app/assets/javascripts/billings/qrtly_reconciliation/init_qrtly_reconciliation_alert.js

 import Vue from 'vue';
-import QrtlyReconciliationAlert from './components/qrtly_reconciliation_alert.vue';
+import QrtlyReconciliationAlert from 'ee/billings/qrtly_reconciliation/components/qrtly_reconciliation_alert.vue';
 
 export const initQrtlyReconciliationAlert = (selector = '#js-qrtly-reconciliation-alert') => {
   const el = document.querySelector(selector);

ee/app/assets/javascripts/pages/admin/dashboard/index.js

-import { initQrtlyReconciliationAlert } from 'ee/admin/qrtly_reconciliation_alert/init_qrtly_reconciliation_alert';
+import { initQrtlyReconciliationAlert } from 'ee/billings/qrtly_reconciliation/init_qrtly_reconciliation_alert';
 
 initQrtlyReconciliationAlert();

ee/app/assets/javascripts/pages/admin/licenses/show/index.js

-import { initQrtlyReconciliationAlert } from 'ee/admin/qrtly_reconciliation_alert/init_qrtly_reconciliation_alert';
+import { initQrtlyReconciliationAlert } from 'ee/billings/qrtly_reconciliation/init_qrtly_reconciliation_alert';
 
 initQrtlyReconciliationAlert();

ee/spec/frontend/admin/qrtly_reconciliation_alert/qrtly_reconciliation_alert_spec.js

 import { GlAlert } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
 import Cookie from 'js-cookie';
-import QrtlyReconciliationAlert from 'ee/admin/qrtly_reconciliation_alert/components/qrtly_reconciliation_alert.vue';
+import QrtlyReconciliationAlert from 'ee/billings/qrtly_reconciliation/components/qrtly_reconciliation_alert.vue';
 
 jest.mock('js-cookie', () => ({
   set: jest.fn(),