Add new config hook: `QUnit.config.testIf(() => {})`

[NullVoxPopuli]

I see that there exists QUnit.test.if(name, condition, testCallback), but using this does not integrate well with flaky-test quarantine strategies.

For example, when running tests, we generate an ourput file (JUnit XML, or whatever), and then the quarantine system interprets that and does some analysis to determine if a test is flaky (over the course of multiple runs).

Next time we start a test suite, we have the list of known flaky tests ahead of time (as a json object available to us on page load).

I'd like to have something like:

const myQuarantineList = []; // actually from file / api / whatever


QUnit.config.testIf((info) => {
  let { id, name } = info;

  let isQuarantined = myQuarantineList.find(x => {
    if (name === x) return true;

    return new RegExp(x).test(name);
  });

  return !isQuarantined;
});