chore: migrate datadog-lambda-go integration tests

.github/workflows/lambda-integration-tests.yml

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+name: Lambda Integration Tests
+
+on:
+  schedule:
+    - cron: '0 15 * * *' # Daily at 15:00 UTC
+  workflow_dispatch: # Allow manual triggering
+
+permissions:
+  contents: read
+
+jobs:
+  lambda-integration-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Set up Go
+        uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
+        with:
+          go-version: '1.25'
+
+      - name: Set up Node 22
+        uses: actions/setup-node@1e60f620b9541d16bece96c5465dc8ee9832be0b # v4.0.3
+        with:
+          node-version: 22
+
+      - name: Cache Node modules
+        id: cache-node-modules
+        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        with:
+          path: "**/node_modules"
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+
+      - name: Install Serverless Framework
+        run: sudo yarn global add serverless@^3.38.0 --prefix /usr/local
+
+      - name: Install dependencies
+        if: steps.cache-node-modules.outputs.cache-hit != 'true'
+        working-directory: contrib/aws/datadog-lambda-go/tests/integration_tests/
+        run: yarn install
+
+      - name: Run Lambda integration tests
+        env:
+          BUILD_LAYERS: true
+          DD_API_KEY: ${{ secrets.DD_API_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        working-directory: contrib/aws/datadog-lambda-go/tests/integration_tests/
+        run: ./run_integration_tests.sh

contrib/aws/datadog-lambda-go/awslambdanorpc.go

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+//go:build lambda.norpc
+// +build lambda.norpc
+
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2016 Datadog, Inc.
+
+package ddlambda
+
+const awsLambdaRpcSupport = false

contrib/aws/datadog-lambda-go/awslambdawithrpc.go

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+//go:build !lambda.norpc
+// +build !lambda.norpc
+
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2016 Datadog, Inc.
+
+package ddlambda
+
+const awsLambdaRpcSupport = true