Add default timeout

[kcpevey]

Fixe flaky playwright tests.

Description

This adds a custom default timeout for all tests which is much longer than the default of 5 seconds. This allows the page to load and the backend to catchup before raising an error.

This pull request:

• adds 30s default timeout for all playwright tests

Pull request checklist

• Did you test this change locally?
• Did you update the documentation (if required)?
• Did you add/update relevant tests for this change (if required)?

Additional information