Allow scripted metric agg to access `_score` (#24295)

* Fixes #24259

Corrects the ScriptedMetricAggregator so that the script can have
access to scores during the map stage.

* Restored original tests. Added seperate test.

As requested, I've restored the non-score dependant tests, and added the
score dependent metric as a seperate test.

1 files changed, 1 insertions, 1 deletions

diff --git a/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregator.java b/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregator.java
index 3bfc057682..cee7b3402f 100644
--- a/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregator.java
+++ b/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregator.java
@@ -63,7 +63,7 @@ public class ScriptedMetricAggregator extends MetricsAggregator {
     public LeafBucketCollector getLeafCollector(LeafReaderContext ctx,
             final LeafBucketCollector sub) throws IOException {
         final LeafSearchScript leafMapScript = mapScript.getLeafSearchScript(ctx);
-        return new LeafBucketCollectorBase(sub, mapScript) {
+        return new LeafBucketCollectorBase(sub, leafMapScript) {
             @Override
             public void collect(int doc, long bucket) throws IOException {
                 assert bucket == 0 : bucket;