feat: added sending warnings from client

[Aleksey28]

[closes #2930]

Purpose

Inform a user that a click was made on a wrong element or page was scrolled to reach the element.

Approach

1. Analyze the ways to send warnings from the client to the server
2. Add tests
3. Implement events and handlers that send information from client to server
4. Add warnings from the client to WarningLog

References

https://github.com/DevExpress/testcafe/issues/2930

Pre-Merge TODO

• [X] Write tests for your proposed changes
• [x] Make sure that existing tests do not fail