[test] fix eventHubConsumerClientUnitTests compile error (#36692)

This error exists and only surfaced recently because of possible
improvements in latest vitest version.

The problem is that `_createEventProcessor` is private in
`EventHubConsumerClient` but is public in the intersection type, leading
to a resolved type of `never` for the first parameter of `spyOn`. Previous
versions of vitest didn't report on this.

This PR casts `client` to `any` instead, which should be fine in tests.

Author: jeremymeng

sdk/eventhub/event-hubs/test/internal/eventHubConsumerClientUnitTests.spec.ts

@@ -19,12 +19,7 @@ function mockCreateEventProcessor(
   client: EventHubConsumerClient,
   mockImpl: (typeof client)["_createEventProcessor"],
 ): void {
-  vi.spyOn(
-    client as EventHubConsumerClient & {
-      _createEventProcessor: (typeof client)["_createEventProcessor"];
-    },
-    "_createEventProcessor",
-  ).mockImplementation(mockImpl as any);
+  vi.spyOn(client as any, "_createEventProcessor").mockImplementation(mockImpl as any);
 }
 
 describe("EventHubConsumerClient", () => {

sdk/eventhub/event-hubs/vitest.browser.config.ts

@@ -2,7 +2,7 @@
 // Licensed under the MIT License.
 
 import { defineConfig, mergeConfig } from "vitest/config";
-import viteConfig from "../../../vitest.shared.config.js";
+import viteConfig from "../../../vitest.browser.base.config.ts";
 import browserMap from "@azure-tools/vite-plugin-browser-test-map";
 import inject from "@rollup/plugin-inject";
 import { fileURLToPath } from "node:url";