browser: go through browser code and reduce forbidigo exceptions

[mstoykov]

After grafana/xk6-browser#1557 there are quite a few foribidgo nolints in the browser code base. And after #4056 is merged those will be part of k6 directly which is why this is opened here.

Most of those likely should just use fsext.

Some of those are logger related, whcih likely needs to jsut be removed outright and use the k6 logger to begin with.