fix: order remote browser close events

[rohan-patnaik]

Summary

• Backport the remote browser close ordering fix from microsoft/playwright@d8d5289.
• Close pages and contexts first, clean up the remote connection, then emit browser disconnected on the next event-loop turn.
• Add async regression tests for pending wait_for_event rejection before browser.close() returns and before disconnected fires.

Closes #3097

Tests

• python -m py_compile playwright\_impl\_browser_type.py tests\async\test_browsertype_connect.py

Full browser tests were not run locally because this checkout does not contain the generated Playwright driver payload.

[Skn0tt]

Looks like tests are red.

[Skn0tt]

Looks like tests are red.

[rohan-patnaik]

Let me check and come back

[rohan-patnaik]

Pushed a follow-up fix after checking the Windows CI timeouts.
The wait_for_event test was hanging because waiter telemetry tried to send waitForEventInfo while the remote pipe was already closing; the update CI should rerun on the new commit.

[rohan-patnaik]

Pushed one more small follow-up after inspecting the latest Windows logs. The previous guard missed the rewritten error message (: Playwright connection closed), so this now treats that rewritten close-path telemetry error the same way.