fix: update GitHub Actions workflow to conditionally upload SDK artif…

…acts and add cleanup step for non-push events (#1562)

.github/workflows/upload-sdk-artifact.yml

@@ -4,7 +4,6 @@ on:
   push:
     branches:
       - master
-on:
   pull_request:
     branches:
       - master
@@ -82,6 +81,17 @@ jobs:
             )
 
       - uses: actions/upload-artifact@v4
+        if: github.event_name == 'push'
         with:
           name: sdk-${{ matrix.generator }}-${{ github.sha }}
           path: ./sdk
+
+  cleanup-artifacts:
+    runs-on: ubuntu-latest
+    needs:
+      - generate-and-upload-sdk
+    if: github.event_name != 'push'
+    steps:
+      - uses: geekyeggo/delete-artifact@v5
+        with:
+          name: swagger-*