CloudWatch Logs: Change what we use to measure progress (#28912)

public/app/plugins/datasource/cloudwatch/datasource.ts

@@ -336,7 +336,7 @@ export class CloudWatchDatasource extends DataSourceApi<CloudWatchQuery, CloudWa
         ({ failures, prevRecordsMatched }, frames) => {
           failures++;
           for (const frame of frames) {
-            const recordsMatched = frame.meta?.stats?.find(stat => stat.displayName === 'Records matched')?.value!;
+            const recordsMatched = frame.meta?.stats?.find(stat => stat.displayName === 'Records scanned')?.value!;
             if (recordsMatched > (prevRecordsMatched[frame.refId!] ?? 0)) {
               failures = 0;
             }

public/app/plugins/datasource/cloudwatch/specs/datasource.test.ts

@@ -186,23 +186,23 @@ describe('CloudWatchDatasource', () => {
 
     it('should stop querying when no more data received a number of times in a row', async () => {
       const fakeFrames = genMockFrames(20);
-      const initialRecordsMatched = fakeFrames[0].meta!.stats!.find(stat => stat.displayName === 'Records matched')!
+      const initialRecordsMatched = fakeFrames[0].meta!.stats!.find(stat => stat.displayName === 'Records scanned')!
         .value!;
       for (let i = 1; i < 4; i++) {
         fakeFrames[i].meta!.stats = [
           {
-            displayName: 'Records matched',
+            displayName: 'Records scanned',
             value: initialRecordsMatched,
           },
         ];
       }
 
-      const finalRecordsMatched = fakeFrames[9].meta!.stats!.find(stat => stat.displayName === 'Records matched')!
+      const finalRecordsMatched = fakeFrames[9].meta!.stats!.find(stat => stat.displayName === 'Records scanned')!
         .value!;
       for (let i = 10; i < fakeFrames.length; i++) {
         fakeFrames[i].meta!.stats = [
           {
-            displayName: 'Records matched',
+            displayName: 'Records scanned',
             value: finalRecordsMatched,
           },
         ];
@@ -1198,7 +1198,7 @@ function genMockFrames(numResponses: number): DataFrame[] {
         },
         stats: [
           {
-            displayName: 'Records matched',
+            displayName: 'Records scanned',
             value: (i + 1) * recordIncrement,
           },
         ],