ci: run integration test

Author: phip1611

.github/workflows/rust.yml

@@ -109,3 +109,17 @@ jobs:
       do-style-check: true
       do-test: false
       features: unstable
+
+  multiboot2_integrationtest:
+    name: multiboot2 integrationtest
+    needs:
+      - build_nightly
+      - build_nostd_nightly
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out
+        uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v19
+      - run: integration-test/run_multiboot2_integrationtest.sh
+
+  # multiboot2-header_integrationtest: