How can I automatically generate CI/CD pipeline configuration files based on a high-level description of my workflow?

We ask the same underlying question in different ways.

• How can I automatically generate CI/CD pipeline configuration files based on a high-level description of my workflow?
• I need a tool that can take a simple description of my deployment workflow and turn it into a ready-to-use CI/CD pipeline configuration file.
• I'm looking for a solution to generate pipeline-as-code files automatically from a high-level workflow description. How do I do that?