Adds POC for bundle template tags

[gdixon]

Description

This PR will expose a test run for {% bundle ... %} template tags:

Before pulling to prod

• install yarn on the cron box:

  curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
  echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
  apt-get update
  apt-get install -y yarn
  yarn global add n
  n stable
  
  yarn install

• and the new requirements:

  pip3 install jsmin==2.2.2 && pip3 install cssmin==0.2.0

Refers/Fixes

Refers: #8860

Testing

Tested locally