Variables: improve performance of transformMetricFindResponse (#49360) (#51435)

* improve performance of transformMetricFindResponse

* use lodash uniqBy for postgres

* use lodash uniqBy for mysql

* use lodash uniqBy for mssql

* hopefully conform to import linting rules

* Added .betterer.results

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>
Co-authored-by: Victor Marin <victor.marin@grafana.com>
(cherry picked from commit 683f31f2c6)

Co-authored-by: Nathaniel Saxe <NathanielSaxophone@gmail.com>

public/app/plugins/datasource/mssql/response_parser.ts

@@ -1,3 +1,5 @@
+import { uniqBy } from 'lodash';
+
 import { AnnotationEvent, DataFrame, MetricFindValue } from '@grafana/data';
 import { BackendDataSourceResponse, toDataQueryResponse, FetchResponse } from '@grafana/runtime';
 
@@ -29,10 +31,7 @@ export default class ResponseParser {
       );
     }
 
-    return Array.from(new Set(values.map((v) => v.text))).map((text) => ({
-      text,
-      value: values.find((v) => v.text === text)?.value,
-    }));
+    return uniqBy(values, 'text');
   }
 
   async transformAnnotationResponse(options: any, data: BackendDataSourceResponse): Promise<AnnotationEvent[]> {

public/app/plugins/datasource/mysql/response_parser.ts

@@ -1,3 +1,5 @@
+import { uniqBy } from 'lodash';
+
 import { AnnotationEvent, DataFrame, MetricFindValue } from '@grafana/data';
 import { BackendDataSourceResponse, FetchResponse, toDataQueryResponse } from '@grafana/runtime';
 
@@ -29,10 +31,7 @@ export default class ResponseParser {
       );
     }
 
-    return Array.from(new Set(values.map((v) => v.text))).map((text) => ({
-      text,
-      value: values.find((v) => v.text === text)?.value,
-    }));
+    return uniqBy(values, 'text');
   }
 
   async transformAnnotationResponse(options: any, data: BackendDataSourceResponse): Promise<AnnotationEvent[]> {

public/app/plugins/datasource/postgres/response_parser.ts

@@ -1,3 +1,5 @@
+import { uniqBy } from 'lodash';
+
 import { AnnotationEvent, DataFrame, MetricFindValue } from '@grafana/data';
 import { BackendDataSourceResponse, FetchResponse, toDataQueryResponse } from '@grafana/runtime';
 
@@ -29,10 +31,7 @@ export default class ResponseParser {
       );
     }
 
-    return Array.from(new Set(values.map((v) => v.text))).map((text) => ({
-      text,
-      value: values.find((v) => v.text === text)?.value,
-    }));
+    return uniqBy(values, 'text');
   }
 
   async transformAnnotationResponse(options: any, data: BackendDataSourceResponse): Promise<AnnotationEvent[]> {