Restore windowSize on test end

### Contribution

- [ ] I'd be willing to implement this feature ([contributing guide](https://github.com/gemini-testing/hermione/blob/master/CONTRIBUTING.md))

### Describe the solution you'd like

if the user changed the window size (`setWindowSize` command) during the tests, then we need to return the original values at the test end to prevent the next test from crashing in this session

### Describe the drawbacks of your solution

_No response_

### Describe alternatives you've considered

_No response_