Elasticsearch: Fix processing of logs with not-recognized time format (#67767)

* Elasticsearch: Fix parsing of invalid time

* Fix lint

* Add more test data to data.js

* Add tests

* Fix lint

* Update pkg/tsdb/elasticsearch/client/search_request.go

devenv/docker/blocks/elastic/data/data.js

@@ -64,6 +64,18 @@ async function elasticSetupIndexTemplate() {
           '@timestamp': {
             type: 'date',
           },
+          '@timestamp_custom': {
+            type: 'date',
+            format: 'yyyy_MM_dd_HH_mm_ss'
+          },
+          '@timestamp_unix': {
+            type: 'date',
+            format: 'epoch_millis'
+          },
+          '@timestamp_nanos': {
+            type: 'date_nanos',
+            format: 'strict_date_optional_time_nanos'
+          },
           counter: {
             type: 'integer',
           },
@@ -115,6 +127,9 @@ function getRandomLogItem(counter, timestamp) {
   const maybeAnsiText = Math.random() < 0.5 ? 'with ANSI \u001b[31mpart of the text\u001b[0m' : '';
   return {
     '@timestamp': timestamp.toISOString(),
+    '@timestamp_custom': timestamp.toISOString().split('.')[0].replace(/[T:-]/g,'_'),
+    '@timestamp_unix': timestamp.getTime(),
+    '@timestamp_nanos': timestamp.toISOString().slice(0,-1) + '123Z',
     line: `log text ${maybeAnsiText} [${randomText}]`,
     counter: counter.toString(),
     float: 100 * Math.random().toString(),