fix remaining linting errors

- ignore shims.d.ts for communication-chat

- suppress errors about Buffer because "buffer" package is used for browser

sdk/communication/communication-chat/eslint.config.mjs

@@ -1,6 +1,9 @@
 import azsdkEslint from "@azure/eslint-plugin-azure-sdk";
 
 export default [
+  {
+    ignores: ["src/shims.d.ts"],
+  },
   ...azsdkEslint.configs.recommended,
   {
     rules: {

sdk/eventgrid/eventgrid-namespaces/src/eventGridNamespacesPublishBinaryMode.ts

@@ -10,6 +10,7 @@ import {
 import { StreamableMethod, operationOptionsToRequestParameters } from "@azure-rest/core-client";
 import { PublishCloudEventOptionalParams } from "./cadl-generated/models/options";
 import { RawHttpHeadersInput } from "@azure/core-rest-pipeline";
+// eslint-disable-next-line @typescript-eslint/no-redeclare
 import { Buffer } from "buffer";
 import { CloudEvent } from "./cadl-generated";
 

sdk/eventgrid/eventgrid-namespaces/test/public/eventGridNamespacesClient.spec.ts

@@ -13,6 +13,7 @@ import {
   EventGridDeserializer,
 } from "../../src";
 import { createRecordedClient } from "./utils/recordedClient";
+// eslint-disable-next-line @typescript-eslint/no-redeclare
 import { Buffer } from "buffer";
 /* eslint no-constant-condition: "off" */
 async function clearMessages(receiverClient: EventGridReceiverClient): Promise<void> {