feat: update php unit test workflow to run in docker

[aspencer]

Description

This change adds additional steps to support running php tests inside of a docker container

Jira Issue: https://revolutionparts.atlassian.net/browse/DEVX-700

Background

Working through changes in the file-scan-daemon, I needed to run tests inside of a docker container. In order to do THAT, I needed a way to run health checks and wait for a docker container to become ready.

Input Changes:

• run_docker - turn on to run tests inside of a docker container
• health_check_command - specific to each application, command to run to determine whether the container is ready (example)
• health_check_timeout - how many seconds to wait for the container to be ready (defaults to 5 mins)

Workflow Changes:
3 new workflow steps, all gated behind the run_docker flag. Most notably, the wait command, which loops through and checks to see whether or not the container is ready to run tests.

Testing Information

Battle-Tested this over on the file-scan-daemon repo, working off a copy that I'm now moving back here.