Failed to project when items contain expr and Cast(expr)

**Describe the bug**
When I want to project column and the result of its type coercion, datafusion will throw error:
```sql
❯ select a, cast(a as Int) from test0;
Plan("Projections require unique expression names but the expression \"test0.a\" at position 0 and \"CAST(test0.a AS Int32)\" at position 3 have the same name. Consider aliasing (\"AS\") one of them.")
```
**To Reproduce**
Run projection with expression and its cast-wrapped expression.

**Expected behavior**

**Additional context**

Reproduce the reported SQL query `select a, cast(a as Int) from test0` in DataFusion and trace the projection-planning path that reports duplicate expression names. No source file or test is named in the issue; completion criteria are not specified because the Expected behavior section is empty.

Written by the indexing model from the issue text.