To create an Azure DevOps pipeline that is cohesive and more easily understandable, create a single YAML step-template that contains all build & test steps required by our CI/CD processes.

• Remove the current hierarchy in our Azure DevOps pipelines (definition->job-template->step-template) and make a single step-template instead.
• Document all build and test steps in the new step-template to make them understandable by anyone with rudimentary knowledge of builds.
• Add a step for each build/test phase, no iterating or using of variables that are more difficult to understand (and allow for multiple tests to run in a single pipeline job).
• Add the split-out venv tests template into the new cohesive step-template.
• Make the CI build use the unified step template.
• Make the Nightly build use the unified step template.