fix: update puppeteer to v25

[bashmish]

What I did

1. Update puppeteer to v25 in @web/test-runner-chrome and @web/test-runner-puppeteer
2. puppeteer v25 required Node 22+, so no major update from the perspective of our new engine requirements, we are aligned on this
3. Replaced removed isConnected() with a new property connected
4. Test which redirects to a new origin became super flaky, I investigated and turned out it's due to a BFCache and browser not closing the WebSocket connection when navigating to a new page, most likely because new puppeteer installed newer Chrome where BFCache is more aggressive, but it's hard to say exactly why it happens. I fixed this by using unload even listener which practically disabled BFCache

[changeset-bot]

🦋 Changeset detected

Latest commit: 64d2d0c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@web/dev-server-core	Patch
@web/test-runner-puppeteer	Patch
@web/test-runner-chrome	Patch

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