[8.5] [ML] Modifies script for population analysis screenshot (#146393)…

… (#146495)

# Backport

This will backport the following commits from `main` to `8.5`:
- [[ML] Modifies script for population analysis screenshot
(#146393)](#146393)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"István Zoltán
Szabó","email":"[email protected]"},"sourceCommit":{"committedDate":"2022-11-29T06:44:25Z","message":"[ML]
Modifies script for population analysis screenshot (#146393)\n\nThis PR
adjusts the screenshot automation script to take
the\r\n`ml-population-results` screenshots with swim lanes
visible.","sha":"115c250a9b79f552395e75b5534d86acc8789597","branchLabelMapping":{"^v8.7.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":[":ml","release_note:skip","v8.7.0","v8.5.3","v8.6.1"],"number":146393,"url":"https://github.com/elastic/kibana/pull/146393","mergeCommit":{"message":"[ML]
Modifies script for population analysis screenshot (#146393)\n\nThis PR
adjusts the screenshot automation script to take
the\r\n`ml-population-results` screenshots with swim lanes
visible.","sha":"115c250a9b79f552395e75b5534d86acc8789597"}},"sourceBranch":"main","suggestedTargetBranches":["8.5","8.6"],"targetPullRequestStates":[{"branch":"main","label":"v8.7.0","labelRegex":"^v8.7.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/146393","number":146393,"mergeCommit":{"message":"[ML]
Modifies script for population analysis screenshot (#146393)\n\nThis PR
adjusts the screenshot automation script to take
the\r\n`ml-population-results` screenshots with swim lanes
visible.","sha":"115c250a9b79f552395e75b5534d86acc8789597"}},{"branch":"8.5","label":"v8.5.3","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.6","label":"v8.6.1","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: István Zoltán Szabó <[email protected]>

x-pack/test/screenshot_creation/apps/ml_docs/anomaly_detection/population_analysis.ts

@@ -14,7 +14,6 @@ export default function ({ getService }: FtrProviderContext) {
   const elasticChart = getService('elasticChart');
   const ml = getService('ml');
   const commonScreenshots = getService('commonScreenshots');
-  const testSubjects = getService('testSubjects');
 
   const screenshotDirectories = ['ml_docs', 'anomaly_detection'];
 
@@ -85,22 +84,12 @@ export default function ({ getService }: FtrProviderContext) {
       await ml.jobTable.filterWithSearchString(populationJobConfig.job_id, 1);
       await ml.jobTable.clickOpenJobInAnomalyExplorerButton(populationJobConfig.job_id);
       await ml.commonUI.waitForMlLoadingIndicatorToDisappear();
-
-      await ml.testExecution.logTestStep('open tooltip and take screenshot');
-      const viewBySwimLanes = await testSubjects.find(viewBySwimLaneTestSubj);
-      const cells = await ml.swimLane.getCells(viewBySwimLaneTestSubj);
-      const sampleCell = cells[0];
-
-      await viewBySwimLanes.moveMouseTo({
-        xOffset: Math.floor(cellSize / 2.0),
-        yOffset: Math.floor(cellSize / 2.0),
-      });
-
       await commonScreenshots.takeScreenshot('ml-population-results', screenshotDirectories);
-
       await ml.testExecution.logTestStep(
         'select swim lane tile, expand anomaly row and take screenshot'
       );
+      const cells = await ml.swimLane.getCells(viewBySwimLaneTestSubj);
+      const sampleCell = cells[0];
       await ml.swimLane.selectSingleCell(viewBySwimLaneTestSubj, {
         x: sampleCell.x + cellSize,
         y: sampleCell.y + cellSize,