* Adding in a new go-agent to use for marketing pipelines. Contains necessary modules to make requirements in edx-mktg

* Setting up the go-agent with a name and resources so it will autoregister with these.

* Leaving php and drush is goagent so we can fall back. Making docs more clear

* Build go-agent-marketing based on tagged image of go-agent

* Attempting to fix build

* Trying latest

* Adding the acquia github key directly into the goagent (#4264)

* Adding the acquia github key directly into the goagent

* Moving the acquia key to the marketing agent