Unable to Set Initial Database via JDBC Connection String Parameters

### Describe the bug, including details regarding any error messages, version, and platform.

When trying to set the initial/default database using the JDBC connection string for Arrow Flight SQL. It appears that none of the following connection string formats successfully set the initial database context:

* `jdbc:arrow-flight-sql://localhost:50051/databse`
* `jdbc:arrow-flight-sql://localhost:50051?database=db`
* `jdbc:arrow-flight-sql://localhost:50051?schema=db`

**Environment:**
* **Arrow Flight SQL JDBC Driver Version:** [Please specify the version you are using, 17.0.0（java 8） and 21.0.0]
* **Server Version:** Doris 2.1.8
* **Operating System:** openSUSE 15.6

未指定原始檔案或測試。首先，在所述的 Doris 2.1.8 環境中使用三個 JDBC URL 重現問題，並檢查 Arrow Flight SQL JDBC driver 如何處理連線參數。完成的標準是：某種受支援的 connection-string 形式能夠選取要求的初始資料庫，或將此限制連同明確的錯誤記錄在文件中。

由索引模型根據 Issue 內容生成。