Summary of changes

1. Removes all the chalk output as it tends to break parsing.
   • When running tests locally, maintainers can now use one of the tap-mocha-reporters to see the output in a human readable format.
   • Here's a list of reporters: https://github.com/tapjs/tap-mocha-reporter/tree/master/lib/reporters
2. Ensures the original error stack is easily available to see in CircleCI and locally.
3. Ensure test runner does not hang in CI indefinitely.

Test Plan

1. Tested against Ci/test262 babel#10500
   • Test results should show up here: https://app.circleci.com/jobs/github/babel/babel/11859/tests
   • Run: https://app.circleci.com/jobs/github/babel/babel/11859

node --no-warnings lib/run-tests arrow-function | $(npm bin)/tap-mocha-reporter spec

After tests finish, it'll collect all the errors with the stacktrace.