Wait longer for push events

What does this MR do?

Sometimes Staging is slow, taking longer than 10 seconds to return push events via the API.

We'll wait up to 60 seconds. If tests still fail consistently after that long we can be more confident there's a significant problem.

Closes #197393 (closed) and #198479 (closed)

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done