[web] add missing await in acceptance test GitOrigin-RevId: d18d62c55609c46c5b8a583e572a415b55a81af7
[web] convert final acceptance tests to es modules GitOrigin-RevId: d0d0cd3dfedbe494ce51dd6f8c180dff02429ad8
GitOrigin-RevId: ab45010ec557d62576c470d2e024549e67261c66