How about Cross compile Pulsar Client Cpp for Arm and Mipsel Linux?

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar-client-cpp/issues) and found nothing similar.

### Version

Ubuntu 22.0, cross compile Pulsar CLient C++ for Mipsel Linux

### Minimal reproduce step

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### What did you expect to see?

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### What did you see instead?

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### Anything else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!

未指定原始檔案、測試、重現步驟或建置入口點。先檢查儲存庫的建置設定和現有的平台支援，然後判斷為 Arm 和 Mipsel Linux 進行交叉編譯所需的內容。對這兩個目標都有一條具備文件且可正常運作的交叉編譯路徑，並完成適當的驗證，即表示完成。

由索引模型根據 Issue 內容生成。