add ack-gie conformance report for v0.5.1

Signed-off-by: Hang Yin <[email protected]>

Author: delavet

conformance/reports/v0.5.1/gateway/ack-gateway-with-inference-extension/README.md

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+# ACK (AlibabaCloud Container Service for Kubernetes) Gateway with Inference Extension
+
+## Table of Contents
+
+| Extension Version Tested | Profile Tested | Implementation Version | Mode    | Report                                                                     |
+|--------------------------|----------------|------------------------|---------|----------------------------------------------------------------------------|
+| v0.5.1                  | Gateway        | v1.4.0-apsara.3         | default | [v1.4.0-apsara.3 Gateway report](./v1.4.0-apsara.3-gateway-report.yaml) |
+| ...                      | ...            | ...                    | ...     | ...                                                                        |
+
+## Reproduce
+
+ACK Gateway with Inference Extension conformance report can be reproduced by the following steps.
+
+1. Create an ACK managed cluster following [guide](https://www.alibabacloud.com/help/en/ack/ack-managed-and-ack-dedicated/user-guide/create-an-ack-managed-cluster-2/).
+
+2. Install ACK Gateway with Inference Extension following Step 2 in [documentation](https://www.alibabacloud.com/help/en/cs/user-guide/intelligent-routing-and-traffic-management-with-ack-gateway-inference-extension).
+
+3. Open `SELF_HOST_EPP` mode for the Gateway controller with following command:
+    ```
+    kubectl patch deployment envoy-gateway -n envoy-gateway-system --type='json' -p='[
+    {
+        "op": "add",
+        "path": "/spec/template/spec/containers/0/env/-",
+        "value": {
+          "name": "SELF_HOST_EPP",
+          "value": "true"
+        }
+      },
+      {
+        "op": "add",
+        "path": "/spec/template/spec/containers/1/env/-",
+        "value": {
+          "name": "SELF_HOST_EPP",
+          "value": "true"
+        }
+      }
+    ]'
+    ```
+
+4. Run the following command from within the [Gateway API inference extension repo](https://github.com/kubernetes-sigs/gateway-api-inference-extension/tree/v0.5.1).
+
+    ```
+    go test -timeout 30m ./conformance -v -args \
+        --gateway-class=ack-gateway \
+        --conformance-profiles=Gateway \
+        --organization=AlibabaCloud \
+        --project=ack-gateway-with-inference-extension \
+        --url= https://www.alibabacloud.com/help/en/cs/user-guide/gateway-with-inference-extension-overview\
+        --version=v1.4.0-apsara.3 \
+        --contact=https://smartservice.console.aliyun.com/service/create-ticket \
+        --report-output="/path/to/report"
+    ```

conformance/reports/v0.5.1/gateway/ack-gateway-with-inference-extension/v1.4.0-apsara.3-gateway-report.yaml

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+GatewayAPIInferenceExtensionVersion: v0.5.1
+apiVersion: gateway.networking.k8s.io/v1
+date: "2025-08-18T18:15:11+08:00"
+gatewayAPIChannel: experimental
+gatewayAPIVersion: v1.3.0
+implementation:
+  contact:
+  - https://smartservice.console.aliyun.com/service/create-ticket
+  organization: AlibabaCloud
+  project: ack-gateway-with-inference-extension
+  url: https://www.alibabacloud.com/help/en/cs/user-guide/gateway-with-inference-extension-overview
+  version: v1.4.0-apsara.3
+kind: ConformanceReport
+mode: default
+profiles:
+- core:
+    result: success
+    statistics:
+      Failed: 0
+      Passed: 9
+      Skipped: 0
+  name: Gateway
+  summary: Core tests succeeded.