Add split_time_range integration test

Recently, there was a regression caused by a bug in splitTimeRangeExt
optimization (see #1454), which splits queries with long time ranges.
Our unit/integration tests failed to catch the issue. The reproducer
for the issue is to run a _search query: sorted by time, over some
time range and with a filter.

This PR adds a new integration test. This test runs the reproducing
query (_search query: sorted by time, over some time range and with
a filter), as well as different variations of the query: short/long
time range, with/without filter, inclusive/exclusive ends of time range.
This should cover the splitTimeRangeExt optimization more thoroughly.

There are two types of tests:
- testTimerangesHandwritten: handwritten different queries
- testTimerangesRandom: randomly generated ranges

Author: avelanarius

ci/it/configs/quesma-split-time-range.yml.template

@@ -0,0 +1,57 @@
+frontendConnectors:
+  - name: elastic-ingest
+    type: elasticsearch-fe-ingest
+    config:
+      listenPort: 8080
+  - name: elastic-query
+    type: elasticsearch-fe-query
+    config:
+      listenPort: 8080
+backendConnectors:
+  - name: my-minimal-elasticsearch
+    type: elasticsearch
+    config:
+      url: "http://{{ .elasticsearch_host }}:{{ .elasticsearch_port }}"
+      user: elastic
+      password: quesmaquesma
+  - name: my-clickhouse-instance
+    type: clickhouse-os
+    config:
+      url: clickhouse://{{ .clickhouse_host }}:{{ .clickhouse_port }}
+logging:
+  path: "logs"
+  level: "info"
+  disableFileLogging: false
+  enableSQLTracing: true
+processors:
+  - name: my-query-processor
+    type: quesma-v1-processor-query
+    config:
+      indexes:
+        testtable1:
+          target:
+            - my-clickhouse-instance
+        "*":
+          target:
+            - my-clickhouse-instance
+  - name: my-ingest-processor
+    type: quesma-v1-processor-ingest
+    config:
+      indexes:
+        testtable1:
+          target:
+            - my-clickhouse-instance
+        "*":
+          target:
+            - my-clickhouse-instance
+
+pipelines:
+  - name: my-elasticsearch-proxy-read
+    frontendConnectors: [ elastic-query ]
+    processors: [ my-query-processor ]
+    backendConnectors: [ my-minimal-elasticsearch, my-clickhouse-instance ]
+  - name: my-elasticsearch-proxy-write
+    frontendConnectors: [ elastic-ingest ]
+    processors: [ my-ingest-processor ]
+    backendConnectors: [ my-minimal-elasticsearch, my-clickhouse-instance ]
+

ci/it/integration_test.go

@@ -76,3 +76,8 @@ func TestIndexNameRewrite(t *testing.T) {
 	testCase := testcases.NewIndexNameRewriteTestcase()
 	runIntegrationTest(t, testCase)
 }
+
+func TestSplitTimeRange(t *testing.T) {
+	testCase := testcases.NewSplitTimeRangeTestcase()
+	runIntegrationTest(t, testCase)
+}