feat(instrumentation-llamaindex): migrate to OTel 1.40 GenAI semantic conventions

Author: lenatraceloop

packages/instrumentation-llamaindex/test/instrumentation.test.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { context, DiagLogger } from "@opentelemetry/api";
+import { context, diag, DiagLogger } from "@opentelemetry/api";
 import { AsyncHooksContextManager } from "@opentelemetry/context-async-hooks";
 import { LlamaIndexInstrumentation } from "../src/instrumentation";
 import * as assert from "assert";
@@ -212,13 +212,7 @@ describe("Test LlamaIndex instrumentation", async function () {
 // No HTTP, no Polly, no API keys needed.
 // ─────────────────────────────────────────────────────────────────────────────
 
-const noopDiag: DiagLogger = {
-  verbose: () => {},
-  debug: () => {},
-  info: () => {},
-  warn: () => {},
-  error: () => {},
-};
+const noopDiag: DiagLogger = diag;
 
 function makeMockChat(options: {
   responseContent?: string;