ci: limit keeping artifacts for PRs (#16976)

.github/workflows/_build-packages.yml

@@ -26,10 +26,14 @@ jobs:
     - uses: actions/checkout@v3
     - run: |
         mkdir dist && touch dist/.placeholder
+    - name: Keep artifact
+      id: keep-artifact
+      run: python -c "print('DAYS=' + str(5 if '${{ github.event_name }}'.startswith('pull_request') else 0))" >> $GITHUB_OUTPUT
     - uses: actions/upload-artifact@v3
       with:
         name: ${{ inputs.artifact-name }}
         path: dist
+        retention-days: ${{ steps.keep-artifact.outputs.DAYS }}
 
 
   build-packages:

.github/workflows/_legacy-checkpoints.yml

@@ -100,11 +100,16 @@ jobs:
       run: |
         bash generate_checkpoints.sh ${{ inputs.pl_version }}
 
+    - name: Keep artifact
+      id: keep-artifact
+      run: python -c "print('DAYS=' + str(30 if '${{ github.event_name }}'.startswith('pull_request') else 0))" >> $GITHUB_OUTPUT
+
     - name: Upload checkpoints to GitHub Actions artifact
       uses: actions/upload-artifact@v3
       with:
         name: checkpoints-${{ github.sha }}
         path: ${{ env.legacy_dir }}/checkpoints/
+        retention-days: ${{ steps.keep-artifact.outputs.DAYS }}
 
     - name: Upload checkpoints to S3 (dryrun)
       working-directory: ${{ env.legacy_dir }}

.github/workflows/docs-build.yml

@@ -127,11 +127,16 @@ jobs:
         run: make linkcheck
         continue-on-error: true
 
+      - name: Keep artifact
+        id: keep-artifact
+        run: python -c "print('DAYS=' + str(7 if '${{ github.event_name }}'.startswith('pull_request') else 0))" >> $GITHUB_OUTPUT
+
       - name: Upload built docs
         uses: actions/upload-artifact@v3
         with:
           name: docs-${{ matrix.pkg-name }}-${{ github.sha }}
           path: docs/build/html/
+          retention-days: ${{ steps.keep-artifact.outputs.DAYS }}
 
 
   deploy-docs: