Parser fails when using alias named "TOP" in SELECT statement

Reproducer: Using datafusion-cli https://github.com/apache/datafusion/tree/main/datafusion-cli compiled from hash 5bbdb7eb1

```
> WITH t AS (SELECT 1 AS val) SELECT tt.val FROM t AS tt;
+-----+
| val |
+-----+
| 1 |
+-----+
1 row(s) fetched.
Elapsed 0.050 seconds.

> WITH t AS (SELECT 1 AS val) SELECT top.val FROM t AS top; 🤔 Invalid statement: SQL error: ParserError("Expected: literal int, found: . at Line: 1, Column: 39")
```

Found by SQLStorm https://github.com/apache/datafusion/issues/17698

Reproduce the failure with datafusion-cli built from hash 5bbdb7eb1, comparing the working alias tt with the failing alias top. Trace the SQL parser's handling of TOP in SELECT aliases and verify that the query using top.val parses and returns the expected row.

Written by the indexing model from the issue text.