Fix a logging error for intermediate artifact preservation.

Author: jonsimantov

.github/workflows/cpp-packaging.yml

@@ -46,13 +46,7 @@ jobs:
           fi
 
       - name: log if preserving intermediate artifacts
-        # Inverse of the conditional on the cleanup_artifacts step.
-        if: |
-          !(
-            (github.event.inputs.preserveIntermediateArtifacts == 0 || github.event.inputs.preserveIntermediateArtifacts == '')
-            && github.event.inputs.downloadPublicVersion == ''
-            && github.event.inputs.downloadPreviousRun == ''
-          )
+        if: ${{ github.event.inputs.preserveIntermediateArtifacts != 0 && github.event.inputs.preserveIntermediateArtifacts != '' }}
         run: echo "::warning ::Intermediate artifacts will be preserved."
 
   build_tools: