Make it easy to run phpunit tests

[larowlan]

Is your feature request related to a problem? Please describe

Helping new users to be able to run tests

Describe the solution you'd like

Add environment variables per phpunit.xml.dist so that tests are just setup https://mglaman.dev/blog/running-drupals-phpunit-test-suites-ddev

[mglaman]

I think I'll take a stab at this :)

[mglaman]

We can copy and paste some things from here: https://github.com/bluehorndigital/drupal-civicrm-project

[mradcliffe]

Also +1 to add in the nightwatch command and container yaml from https://github.com/bluehorndigital/drupal-testing-workshop