Code Insights: Fix chart Percy screenshot tests

Created by: vovakulikov

Currently, we have flaky code insights chart screenshot tests. And because of that, we have a lot of false-positive Percy failed pipelines (see screenshot below)

My guess is that flakiness comes from the mouse position (perhaps the initial position is the viewport center) and then insight grid animation is happening and this may trigger tooltip appearance. A possible fix for it is to set mouse position for the visual screenshot tests of the insight grid explicitly.