Fix SH Runner False Negative

[AdnaneKhan]

Gato-X was not detecting a workflow as containing a potential self-hosted runner if it used a matrix job where the 'runs-on' value was a list of labels like so:

 build:
    strategy:
      matrix:
        profile: [ 'jdk17', 'jdk17-aarch64' ]
        include:
          - jdk_version: '17'
          - profile: 'jdk17'
            runs_on: ubuntu-latest
          - profile: 'jdk17-aarch64'
            runs_on: [ linux, ARM64 ]

This PR also moved the logic into the job step to clean up the bloat within the workflow parser file.