Update e2e tests

- Fix native configs for win in sample app.
- Integrate spring-native with samples app.
- Tweak e2e workflow to upload artifacts and some other generic changes.
- Relates #401

.github/workflows/e2e.yml

@@ -19,7 +19,7 @@ jobs:
           - nickname: linux
             os: ubuntu-latest
             graal: 22.0.0.2
-    name: CI Native ${{ matrix.nickname }}
+    name: E2E ${{ matrix.nickname }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v2
@@ -39,6 +39,14 @@ jobs:
           node-version: '14'
       - run: |
           ./mvnw clean package -Pnative
+      - uses: actions/upload-artifact@v2
+        with:
+          name: spring-shell-samples-${{ matrix.nickname }}
+          retention-days: 1
+          path: |
+            spring-shell-samples/target/*.jar
+            spring-shell-samples/target/spring-shell-samples
+            spring-shell-samples/target/spring-shell-samples.exe
       - name: compile e2e module
         working-directory: e2e/spring-shell-e2e
         run: |