[monitor-ingestion] Typescript related changes (Azure#35904)

Author: HarshaNalluru

specification/monitor/Azure.Monitor.Ingestion/tspconfig.yaml

@@ -41,7 +41,9 @@ options:
     output-path: "./src/Generated"
   "@azure-tools/typespec-ts":
     package-dir: "monitor-ingestion"
+    is-modular-library: true
     package-details:
       name: "@azure/monitor-ingestion"
       description: "Azure Monitor Ingestion library"
+      version: "1.2.0"
     flavor: azure