Update capybara to newer version (lack of hover method in < 2.1)

[#67779220]
Refactor completely basic test of public, curricular interactives

[#67779220]

Run all of them in one tests (performance), generate screenshots
locally and create special dir with results.
Add an HTML page that presents results of the Selenium test

[#67779220]
Implement helper that handles screenshot saving, metadata generation etc.

[#67779220]
Refactor tests, use new test helper

[#67779220]