Fully move backup integration test to mock server

ts/test-mock/benchmarks/backup_bench.ts

@@ -0,0 +1,47 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+/* eslint-disable no-console */
+
+import { pipeline } from 'node:stream/promises';
+import { createWriteStream } from 'node:fs';
+import { mkdir } from 'node:fs/promises';
+import { join } from 'node:path';
+
+import { Bootstrap } from './fixtures';
+import { generateBackup } from '../../test-both/helpers/generateBackup';
+
+Bootstrap.benchmark(async (bootstrap: Bootstrap): Promise<void> => {
+  const { phone, cdn3Path } = bootstrap;
+
+  const { backupId, stream: backupStream } = generateBackup({
+    aci: phone.device.aci,
+    profileKey: phone.profileKey.serialize(),
+    masterKey: phone.masterKey,
+    conversations: 1000,
+    messages: 60 * 1000,
+  });
+  const backupFolder = join(
+    cdn3Path,
+    'backups',
+    backupId.toString('base64url')
+  );
+  await mkdir(backupFolder, { recursive: true });
+  const fileStream = createWriteStream(join(backupFolder, 'backup'));
+  await pipeline(backupStream, fileStream);
+
+  const importStart = Date.now();
+
+  const app = await bootstrap.link();
+  await app.waitForBackupImportComplete();
+
+  const importEnd = Date.now();
+
+  const exportStart = Date.now();
+  await app.uploadBackup();
+  const exportEnd = Date.now();
+
+  console.log('run=%d info=%j', 0, {
+    importDuration: importEnd - importStart,
+    exportDuration: exportEnd - exportStart,
+  });
+});