CJS vs ESM import issue?

### [READ] Step 1: Are you in the right place?
Yes

### [REQUIRED] Step 2: Describe your environment

* Operating System version: MacOS 15.4.1
* Firebase SDK version: firebase-admin 12.5.0
* Firebase Product: storage
* Node.js version: 20.13.1
* NPM version: 10.8.0

### [REQUIRED] Step 3: Describe the problem
Basically what happened [here](https://github.com/firebase/firebase-admin-node/discussions/2639). It's just there has been no answer to that, only workaround, so I post it here.

Happened to me when importing:
```ts
import type { File } from "@google-cloud/storage";
```

It says:
```console
TS2322: Type
import("/WebstormProjects/firebase/functions/node_modules/@google-cloud/storage/build/cjs/src/file").File
is not assignable to type
import("/WebstormProjects/firebase/functions/node_modules/@google-cloud/storage/build/esm/src/file", { with: { "resolution-mode": "import" } }).File
Property #private in type File refers to a different member that cannot be accessed from within type File
```

#### Steps to reproduce:

Create Firebase Cloud Functions project using typescript and ESM.

#### Relevant Code:
tsconfig:
```json
"module": "Node16",
"moduleResolution": "Node16",
"target": "es2020",
```

首先，在使用 ESM、Node.js 20.13.1、firebase-admin 12.5.0 以及所示 Node16 tsconfig 的 Firebase Cloud Functions TypeScript 项目中复现报告的赋值错误。比较 @google-cloud/storage 的 CJS 和 ESM File 类型，以及 issue 中链接的讨论；当原因和适当的项目级解决方案确定后，即表示完成。

由索引模型根据 Issue 内容生成。