test(bedrock-agentcore-alpha): add integ test for tracing resource policy opt-out

Adds integration test covering the NONE mode for TracingResourcePolicyMode,
verifying tracing delivery resources are created without the X-Ray resource policy.
Snapshot to be generated once full build pipeline is available.

Author: gingeekrishna

packages/@aws-cdk/aws-bedrock-agentcore-alpha/test/agentcore/runtime/integ.runtime-tracing-policy.ts

@@ -0,0 +1,37 @@
+/**
+ * Integration test for Bedrock AgentCore Runtime tracing resource policy opt-out.
+ * This test creates a runtime with tracing enabled but with the X-Ray resource
+ * policy creation disabled, for use when a shared policy is managed elsewhere.
+ */
+
+/// !cdk-integ aws-cdk-bedrock-agentcore-runtime-tracing-policy
+
+import * as path from 'path';
+import * as integ from '@aws-cdk/integ-tests-alpha';
+import * as cdk from 'aws-cdk-lib';
+import * as agentcore from '../../../lib';
+
+const app = new cdk.App();
+const stack = new cdk.Stack(app, 'aws-cdk-bedrock-agentcore-runtime-tracing-policy');
+
+const runtimeArtifact = agentcore.AgentRuntimeArtifact.fromAsset(
+  path.join(__dirname, 'testArtifact'),
+);
+
+// Runtime with tracing enabled but X-Ray resource policy creation disabled.
+// This is the opt-out path for accounts where a shared resource policy is
+// managed outside this stack (avoids the 20-policy per-region quota).
+new agentcore.Runtime(stack, 'TracingPolicyNoneRuntime', {
+  runtimeName: 'integ_tracing_policy_none_runtime',
+  description: 'Runtime with tracing enabled and resource policy creation disabled',
+  agentRuntimeArtifact: runtimeArtifact,
+  protocolConfiguration: agentcore.ProtocolType.HTTP,
+  tracingEnabled: true,
+  tracingResourcePolicy: {
+    mode: agentcore.TracingResourcePolicyMode.NONE,
+  },
+});
+
+new integ.IntegTest(app, 'BedrockAgentCoreRuntimeTracingPolicyTest', {
+  testCases: [stack],
+});