Merge and rename github workflows

[dustinblack]

What is the relationship between this workflow and .github/workflows/build.yaml? (E.g., shouldn't we make sure the build runs successfully before we run this workflow?)

(FWIW, workflow.yaml is an annoyingly generic name, and the stuff at the top of the file doesn't shed a great deal of light on what this file does.)

Originally posted by @webbnh in arcalot/arcaflow-plugin-coremark-pro#1 (comment)