Use new date_histogram intervals in timelion (#77160)

src/plugins/vis_type_timelion/server/series_functions/es/es.test.js

@@ -100,9 +100,17 @@ describe('es', () => {
       expect(agg.time_buckets.date_histogram.time_zone).to.equal('Etc/UTC');
     });
 
-    it('sets the field and interval', () => {
+    it('sets the field', () => {
       expect(agg.time_buckets.date_histogram.field).to.equal('@timestamp');
-      expect(agg.time_buckets.date_histogram.interval).to.equal('1y');
+    });
+
+    it('sets the interval for calendar_interval correctly', () => {
+      expect(agg.time_buckets.date_histogram).to.have.property('calendar_interval', '1y');
+    });
+
+    it('sets the interval for fixed_interval correctly', () => {
+      const a = createDateAgg({ timefield: '@timestamp', interval: '24h' }, tlConfig);
+      expect(a.time_buckets.date_histogram).to.have.property('fixed_interval', '24h');
     });
 
     it('sets min_doc_count to 0', () => {

src/plugins/vis_type_timelion/server/series_functions/es/lib/create_date_agg.js

@@ -19,20 +19,22 @@
 
 import _ from 'lodash';
 import { buildAggBody } from './agg_body';
+import { search } from '../../../../../../plugins/data/server';
+const { dateHistogramInterval } = search.aggs;
 
 export default function createDateAgg(config, tlConfig, scriptedFields) {
   const dateAgg = {
     time_buckets: {
       meta: { type: 'time_buckets' },
       date_histogram: {
         field: config.timefield,
-        interval: config.interval,
         time_zone: tlConfig.time.timezone,
         extended_bounds: {
           min: tlConfig.time.from,
           max: tlConfig.time.to,
         },
         min_doc_count: 0,
+        ...dateHistogramInterval(config.interval),
       },
     },
   };