Save screenshots as artifacts for failed e2e tests

[kschiffer]

Summary

It would be helpful to have the screenshots of failed end-to-end tests saved as action artifact.

Why do we need this?

This can help speeding up fixing failed e2e tests.

What is already there? What do you see now?

Nothing of that sort.

What is missing? What do you want to see?

Screenshots of failed test steps being uploaded as artifacts, so they will be attached to the action.

How do you propose to implement this?

Iirc, cypress generates screenshots for failed tests by default. These files can be uploaded using the upload-artifact action:
https://github.com/actions/upload-artifact

I also used this in my initial e2e test PR.

Can you do this yourself and submit a Pull Request?

@bafonins