[1.8.x] Community PR tweaks.

[scottarnette]

Change Description

This is a quick change to Actions runs when community PRs are submitted:

• Remove now unnecessary job that executed before build/test steps occurred in Github Actions.
  • This step was required due to a bug in Actions where if all workflow steps were skipped, such as when org based PRs are executed, the build would be marked as failed.
  • The behavior now shows status as expected, where the steps based in the org do now show up at all.

See:
Actions | Actions run from #8693 showing the same functionality as before.
Actions | Actions run created from this PR where all steps are skipped as expected. No checks from Actions show as failed in this PR.

Consensus Changes

• Consensus Changes

API Changes

• API Changes

Documentation Additions

• Documentation Additions