CTE FROM Statement should be of type ObjectName or TableFactor

First of all, thanks for this awesome package!

While parsing the AST, I came Across Cte's FROM Statement:
https://github.com/sqlparser-rs/sqlparser-rs/blob/6b2b3f1f6c903bddc87ba0858b5ccdb94c5e2242/src/ast/query.rs#L337-L341

This renders as WITH ... AS ... FROM ...
While I am not sure which Database actually supports this syntax, I expected FROM to be an `ObjectName` or `TableFactor`, so basically a `Vec` instead of a single `Ident`.

I am not 100% sure this is actually a bug as I don't know which Database supports this syntax. It feels wrong though for this FROM to behave so differently.

從 src/ast/query.rs 中第337-341行附近的 CTE 定義開始，檢查周圍的 AST 型別如何表示 FROM 欄位。確認哪些 SQL 方言支援這種形式，並將其與其他位置對 ObjectName 和 TableFactor 的使用進行比較。當預期的 CTE FROM 語法具有一致且經過驗證的 AST 表示時，即表示完成。

由索引模型根據 Issue 內容生成。