[Recorder] Add return types to test/utils methods (Azure#20510)

Author: HarshaNalluru

sdk/test-utils/recorder/test/utils/utils.ts

@@ -1,4 +1,4 @@
-import { createPipelineRequest, HttpMethods } from "@azure/core-rest-pipeline";
+import { createPipelineRequest, HttpMethods, PipelineResponse } from "@azure/core-rest-pipeline";
 import { expect } from "chai";
 import { env } from "../../src";
 import { isLiveMode, TestMode } from "../../src/utils/utils";
@@ -14,7 +14,7 @@ export const setTestMode = (mode: TestMode): TestMode => {
  * Returns the test server url
  * Acts as the endpoint [ Works as a substitute to the actual Azure Services ]
  */
-export function getTestServerUrl() {
+export function getTestServerUrl(): string {
   // utils/server.ts creates a localhost server at port 8080
   // - In "live" mode, we are hitting directly the localhost endpoint
   // - In "record" and "playback" modes, we need to hit the localhost of the host network
@@ -39,7 +39,7 @@ export async function makeRequestAndVerifyResponse(
     method: HttpMethods;
   },
   expectedResponse: { [key: string]: unknown } | undefined
-) {
+): Promise<PipelineResponse> {
   const req = createPipelineRequest({
     url: request.url ?? getTestServerUrl() + request.path,
     body: request.body,