test(integration): Bump default timeouts 5 -> 10

[Dav1dde]

Slow github CI -> longer timeouts. When tests are fast longer timeouts should not have any negative effects, as they are used to await a message.

Ideally helps with CI errors like:

  File "/home/runner/work/relay/relay/tests/integration/test_feedback.py", line 133, in test_feedback_events_without_processing
    envelope = mini_sentry.get_captured_event()
  File "/home/runner/work/relay/relay/tests/integration/fixtures/mini_sentry.py", line 207, in get_captured_event
    return self.captured_events.get(timeout=timeout or self.timeout)
           ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.13.5/x64/lib/python3.13/queue.py", line 212, in get
    raise Empty
_queue.Empty

This is crazy:

2025-12-05T11:47:12.507121Z TRACE relay_server::services::processor::event: processing user_report_v2
2025-12-05T11:47:17.213923Z TRACE relay_server::services::processor: sending envelope to sentry endpoint