[LogsUI] Clean up indices before running no data test suite (elastic#…

…196500)

## 📓 Summary

Closes elastic#196031 

These changes add a preventive indices cleanup before the log rate and
log categories tests where assertions run against expected no-data
pages. This is a preventive measure in case other test suites in the
same configuration are not correctly cleaning the installed data or race
conditions occur.

Co-authored-by: Marco Antonio Ghiani <[email protected]>

x-pack/test/functional/apps/infra/logs/log_entry_categories_tab.ts

@@ -58,6 +58,8 @@ export default ({ getPageObjects, getService }: FtrProviderContext) => {
     };
 
     describe('with a trial license', () => {
+      before(() => logsUi.cleanIndices());
+
       it('Shows no data page when indices do not exist', async () => {
         await logsUi.logEntryCategoriesPage.navigateTo();
 

x-pack/test/functional/apps/infra/logs/log_entry_rate_tab.ts

@@ -11,9 +11,9 @@ import { FtrProviderContext } from '../../../ftr_provider_context';
 
 export default ({ getPageObjects, getService }: FtrProviderContext) => {
   const PageObjects = getPageObjects(['security']);
+  const esArchiver = getService('esArchiver');
   const logsUi = getService('logsUi');
   const retry = getService('retry');
-  const esArchiver = getService('esArchiver');
   const security = getService('security');
 
   describe('Log Entry Rate Tab', function () {
@@ -58,6 +58,8 @@ export default ({ getPageObjects, getService }: FtrProviderContext) => {
     };
 
     describe('with a trial license', () => {
+      before(() => logsUi.cleanIndices());
+
       it('shows no data page when indices do not exist', async () => {
         await logsUi.logEntryRatePage.navigateTo();
 

x-pack/test/functional/services/logs_ui/index.ts

@@ -15,5 +15,21 @@ export function LogsUiProvider(context: FtrProviderContext) {
     logEntryCategoriesPage: LogEntryCategoriesPageProvider(context),
     logEntryRatePage: LogEntryRatePageProvider(context),
     logStreamPage: LogStreamPageProvider(context),
+    cleanIndices: createCleanIndicesHandler(context),
   };
 }
+
+const createCleanIndicesHandler = (context: FtrProviderContext) => async () => {
+  const es = context.getService('es');
+  const log = context.getService('log');
+
+  log.info('Deleting all the indices');
+
+  const indicesResponse = await es.indices.get({ index: '*' });
+
+  const indicesDeletionPromises = Object.keys(indicesResponse).map((index) =>
+    es.indices.delete({ index })
+  );
+
+  return Promise.all(indicesDeletionPromises);
+};