deleteApp apparently doesn't complete teardown of Firestore connections

[dandv]

Describe your environment

• Operating System version: Fedora Linx 38
• Firebase SDK version: 13.0.2
• Firebase Product: admin SDK apparently / Firestore
• Node.js version: 22.12.0
• NPM version: 11.0.0
• Deno version 2.1.4

Describe the problem

I'm running a simple Deno test of writing to a document in a Firestore collection. The test passes, but Deno detects leaks:

error: Leaks detected:
  - "http2Client" was created during the test, but not cleaned up during the test. Close the resource before the end of the test.
  - "http2ClientConnection" was created during the test, but not cleaned up during the test. Close the resource before the end of the test.
  - 2 intervals were started in this test, but never completed. This is often caused by not calling `clearInterval`.
  - 2 timers were started in this test, but never completed. This is often caused by not calling `clearTimeout`.
  - An async call to op_http2_poll_client_connection was started in this test, but never completed.

Steps to reproduce:

deno test --allow-all leaks-bug.ts

leaks-bug.ts

import { initializeApp, cert, deleteApp } from 'firebase-admin/app';
import { getFirestore } from 'firebase-admin/firestore';
import { assertExists } from '@std/assert';

Deno.test('test', 
  async () => {
    // Initialize Cloud Firestore per https://firebase.google.com/docs/firestore/quickstart#initialize -> Node.js -> Initialize on your own server
    const app = initializeApp({ credential: cert('service-account-key.json') });
    const db = getFirestore(app);

    const doc = await db.collection('test').doc('test').set({ foo: 42 });
    assertExists(doc);  // passes
    await deleteApp(app);  // doesn't help
    await new Promise(resolve => setTimeout(resolve, 10 * 1000));  // doesn't help
  }
);

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