Run tests with code coverage enabled, and upload coverage to Codecov (attempt 2)

Author: DilumAluthge

.github/workflows/ci.yml

@@ -44,4 +44,13 @@ jobs:
           docker exec -t slurmctld srun -n 4 hostname
       - name: Test SlurmClusterManager
         run: |
-          docker exec -t slurmctld julia -e 'import Pkg; Pkg.activate("SlurmClusterManager"); Pkg.test()'
+          docker exec -t slurmctld julia -e 'import Pkg; Pkg.activate("SlurmClusterManager"); Pkg.test(; coverage=true)'
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v5
+        with:
+          files: lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}
+          # If this PR is from a fork, then do NOT fail CI if the Codecov upload errors.
+          # If this PR is NOT from a fork, then DO fail CI if the Codecov upload errors.
+          # If this is not a PR, then DO fail CI if the Codecov upload errors.
+          fail_ci_if_error: ${{ github.event_name != 'pull_request' || github.repository == github.event.pull_request.head.repo.full_name }}