chore(delete-user-data): upgrade runtime to node22

[HassanBahati]

Description

Update the delete-user-data extension to use Node.js 22 for its Cloud Functions

Related Issues:

Part of Fixes #2659
Fixes #2662

Changes Made

• Extension manifest (delete-user-data/extension.yaml)

  • Bumped version from 0.1.26 to 0.1.27.
  • Updated all function runtimes from nodejs20 to nodejs22:
    • clearData
    • handleSearch
    • handleDeletion

• Functions package (delete-user-data/functions/package.json)

  • Updated "engines.node" from "20" to "22" to reflect the new runtime.

• TypeScript configuration (delete-user-data/functions/tsconfig.json)

  • Added "skipLibCheck": true so TypeScript does not type-check declaration files in node_modules.
  • This works around invalid typings in @google-cloud/storage (Int32Array<ArrayBuffer> in crc32c.d.ts), which were causing build failures after dependency upgrades.

Testing Evidence

Tests Run

• Unit tests
• Integration tests
• Manual testing (install / audit / build)