flavors_test_macos is failing, timing out #119782
Description
This test was turned on in #119564 and is consistently failing on timeout.
https://ci.chromium.org/p/flutter/builders/staging/Mac%20flavors_test_macos/54
https://ci.chromium.org/p/flutter/builders/staging/Mac%20flavors_test_macos/44
