Some colleagues might be using "it.only()" while debugging a failing test, however, they don't intend to commit it (SERVER-126360 will provide another debug option).

We can add a JavaScript linter check prohibiting the use of "it.only()" unless this is intentional and we can provide the linter exception comment like

// eslint-disable-next-line no-it-only
it.only("we only need to run this for now", function() {
    ...
});