fix(e2e): race condition fixes

[nikparo]

Closes #

📝 Description

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I found the e2e testing suite very flaky while exploring lit wrapper support. The root issue was mainly that the tests were not waiting for new rendered elements to appear. For me pnpm e2e-react now runs consistently without failures. I still see the occasional flakiness when the page doesn't render at all (less than 0.5%), but not sure how to combat that.

I have not tested this against the e2e testing suites other than react since they don't seem maintained(?) and have a lot of failures on main.

⛳️ Current behavior (updates)

Please describe the current behavior that you are modifying

The e2e tests often don't wait for elements to become visible or receive focus before trying to interact (fire off keyboard events etc), resulting in race conditions and flakiness.

🚀 New behavior

Please describe the behavior or changes this PR adds

e2e tests wait for the elements to become visible, receive focus etc. before continuing to interact with the component.

💣 Is this a breaking change (Yes/No):

No

📝 Additional Information

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