Replace Entra app client secret auth with OpenID Connect in E2E tests. (#1792)

* Use Az login with OpenID connection to get test credentials.

* Set subscription id environment variable.

* Update testExplorer and cleanup job.

* Retrieve access token in test case and pass to testExplorer.

* Add debug tracing for tests.

* Set up other mongo test to use Az CLI creds.

* Revert subscription id retrieval.

* Add CLI credentials retrieval to rest of tests.

* Fix missing imports.

* Clean up redundant code.

* Remove commented import statement.

test/selfServe/selfServeExample.spec.ts

@@ -1,5 +1,10 @@
+import { getAzureCLICredentialsToken } from "../utils/shared";
+
 test("Self Serve", async () => {
-  await page.goto("https://localhost:1234/testExplorer.html?iframeSrc=selfServe.html");
+  // We can't retrieve AZ CLI credentials from the browser so we get them here.
+  const token = await getAzureCLICredentialsToken();
+
+  await page.goto(`https://localhost:1234/testExplorer.html?iframeSrc=selfServe.html&token=${token}`);
   const handle = await page.waitForSelector("iframe");
   const frame = await handle.contentFrame();