Add package pull test for NPM

Context

You can use npm publish and install your node dependencies to the GitLab Package Registry. On GitLab.com npm is the most frequently used package manager format with nearly 100k packages installed each day. Naturally, this amount of usage means increased risk for bugs and customer incidents.

Proposal

Add a test that tests installing a node package using npm (and yarn for extra credit), so that we can discover issues prior to Community members.

Documentation: https://docs.gitlab.com/ee/user/packages/npm_registry/#install-a-package