Apologies if this is a duplicate, but I couldn't find another ticket.
I'd like to create a job that runs a standalone stage, and a matrix based stage, in parallel. Below is an example of what I'm thinking. The AWS job has different steps / params, so it would be run in parallel to the matrix build, which has several more variants.
When running the below, the build stops, and tells me `"matrix" or "parallel" cannot be nested inside another "matrix" or "parallel"`.