Fix the integration tests by alternative

[vedhav]

Closes https://github.com/insightsengineering/coredev-tasks/issues/554

Changes:

1. ~The container in the integration test does not seem to evaluate the JS code to check visibility when app_driver$is_visible is called with visibility_property = TRUE~ Bumping the chrome version to resolve this issue.
2. Increasing the timeout threshold for wait_for_page_stability. For an unknown reason this timeout does not work in certain containers. Initial timeout (500ms) was set as a 2x of what was needed in my local machine. But looks like we need at least 800 ms to work in some loaded conditions. So, setting it to 2000 ms now.