`GenericDialect` should support multi-table DELETE and DELETE without FROM clause

According to the design policy, `GenericDialect` is intended to parse any SQL that other dialects can handle, but it currently fails to parse multi-table DELETE statements and DELETE statements without a FROM clause.

I think the expected behavior is that the following tests should also pass with `GenericDialect`.

https://github.com/apache/datafusion-sqlparser-rs/blob/2182f7ea71242a7e9674932d559baef67dae522d/tests/sqlparser_common.rs#L688-L735

Comienza con las líneas 688-735 de tests/sqlparser_common.rs y ejecuta las pruebas referenciadas usando GenericDialect. Sigue el flujo de análisis sintáctico de las sentencias DELETE con varias tablas y de las sentencias DELETE sin una cláusula FROM. La tarea está terminada cuando ambos grupos de pruebas existentes pasan con GenericDialect.

Escrito por el modelo de indexación a partir del texto del issue.