The workflow compiler always adds discussions permission into generated jobs

[jaroslawgajewski]

Problem

• Observed behavior: The workflow compiler always adds discussions permission into generated jobs: conclusion and safe_outputs.

  agent:
    needs: activation
    runs-on: ubuntu-latest
    permissions:
      actions: read
      contents: read
      **discussions: read**

if discussions are not available (GitHub Enterprise) GitHub app cannot have such scope

Expected result

if discussions are nt defined in premissions -> md file they should not be included