Use the rejectToast function from utils instead of a fixture

[andybalaam]

This is part of my mission to improve the way we handle toasts in our Playwright tests. See also:

• playwright-common utilities for handling toasts element-web#33119
• Improve the toasts fixture of the playwright-common tools element-web#33158
• Use rejectToast in playwright tests to reject toasts element-web#33025
• Replace toasts fixture in playwright-common with utility functions. element-web#33152
• Bump @element-hq/element-web-playwright-common version to 4.1.0 element-web#33500
• Replace use of the toasts fixture with the new toasts utils element-web#33495
• Utilities for handling toasts in Element Web #256
• In lifecycle tests, dismiss the Verify toast if it appears #252
• Bump element-web-playwright-common to 4.0.0 #261

This PR also bumps element-web-playwright-common to 4.1.0

[dbkr]

I assume the fixture is still used elsewhere?

[andybalaam]

I assume the fixture is still used elsewhere?

Yes, it's still in use in element-web. I will push a release of playwright-common when element-web and element-modules have stopped using it.