chore: add integration test main workflow

Author: reshnm

.github/workflows/integration_test_main.yaml.yml

@@ -0,0 +1,39 @@
+name: Integration Test Pull Main Update
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest-8core
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+        with:
+          submodules: recursive
+
+      - name: Set up Go
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5
+        with:
+          go-version-file: go.mod
+
+      - name: make revendor
+        run: make revendor
+
+      - name: make build
+        run: make build
+
+      - name: run integration test
+        env:
+          GARDENER_KUBECONFIG: ${{ secrets.GARDENER_LAAS_SERVICE_ACCOUNT }}
+        run: |
+          VERSION="$("./hack/get-version.sh")"
+          PR_ID=1
+          "./hack/integration-test-runner.sh" "$GARDENER_KUBECONFIG" "garden-laas" "$VERSION" "$PR_ID"
+