With using parameterized tests the test names will contain the parameter and so the previous assumption that some tests can end in `None` will not hold in all cases anymore as now we can have `privateBrowsingNone[composableToolbar=false]`. Moved to a more flexible approach of removing the `None` part from test names which will allow building the results table with support for more test names. Differential Revision: https://phabricator.services.mozilla.com/D259996