DataGrid - Fix unstable 'FilterRow range overlay screenshot' test

I also noticed that the [FilterRow range overlay screenshot](https://github.com/DevExpress/DevExtreme/actions/runs/21987618277/job/63716049322?pr=32533) test flickers frequently. For example, here: https://github.com/DevExpress/DevExtreme/actions/runs/22054602512/job/63720081631?pr=32575.