feat: Download SLA reports (#9201)

app/javascript/dashboard/store/modules/SLAReports.js

@@ -1,7 +1,7 @@
 import * as MutationHelpers from 'shared/helpers/vuex/mutationHelpers';
 import types from '../mutation-types';
 import SLAReportsAPI from '../../api/slaReports';
-
+import { downloadCsvFile } from 'dashboard/helper/downloadHelper';
 export const state = {
   records: [],
   metrics: {
@@ -60,6 +60,11 @@ export const actions = {
       commit(types.SET_SLA_REPORTS_UI_FLAG, { isFetchingMetrics: false });
     }
   },
+  download(_, params) {
+    return SLAReportsAPI.download(params).then(response => {
+      downloadCsvFile(params.fileName, response.data);
+    });
+  },
 };
 
 export const mutations = {