`Parser::parse_query` doesn't detect wildcard syntax errors

For some reason `Parser::parse_query` thinks the following are valid queries (whereas `Parser::parse_sql` correctly detects them as syntax errors):

```
SELECT * as foo FROM bar;
SELECT * foo FROM bar;
SELECT * 5 FROM bar;
```

Code to reproduce:

```rust
use sqlparser::{dialect::AnsiDialect, parser::Parser, tokenizer::Tokenizer};

fn main() {
let dialect = AnsiDialect {};
let bogus_query = "SELECT * as foo";

// Parser::parse_sql fails as expected with:
// ParserError("Expected end of statement, found: as")
assert!(Parser::parse_sql(&dialect, bogus_query).is_err());

// Parser::parse_query however does not detect the syntax error
let tokens = Tokenizer::new(&dialect, bogus_query).tokenize().unwrap();
let mut parser = Parser::new(tokens, &dialect);
assert!(parser.parse_query().is_ok());
}
```

Start at Parser::parse_query and compare its behavior with Parser::parse_sql using the supplied Rust reproduction and Tokenizer setup. Trace how the three malformed SELECT queries are handled, then add regression coverage so parse_query rejects each wildcard syntax error while valid queries continue to parse.

Scritto dal modello di indicizzazione a partire dal testo della issue.