bug: BigQuery dialect parsing error when cast as date using format

[aballiet]

sqlglot fails at parsing BigQuery SQL query containing cast with date format.

Example :

Fully reproducible code snippet

query = """
with clean as (
  select
    _row
    , cast(start_date as date format 'MM/DD/YYYY') as start_date
    , cast(end_date as date format 'MM/DD/YYYY') as end_date
  from `my_project`.`my_schema`.`my_table`
)

select *
from clean
"""

from sqlglot import parse_one

parse_one(query, read="bigquery")

-> Generates the error :

{
    "name": "ParseError",
    "message": "Expecting ). Line 5, Col: 36.\n  \nwith clean as
    ....
}

Expected output :

(SELECT expressions: 
  (STAR ), from: 
  (FROM this: 
    (TABLE this: 
      (IDENTIFIER this: clean, quoted: False))), with: 
  (WITH expressions: 
    (CTE this: 
      (SELECT expressions: 
        (COLUMN this: 
          (IDENTIFIER this: _row, quoted: False)), 
        (ALIAS this: 
          (CAST this: 
            (COLUMN this: 
              (IDENTIFIER this: start_date, quoted: False)), to: 
            (DATATYPE this: Type.DATE, nested: False, prefix: False)), alias: 
          (IDENTIFIER this: start_date, quoted: False)), 
        (ALIAS this: 
          (CAST this: 
            (COLUMN this: 
              (IDENTIFIER this: end_date, quoted: False)), to: 
            (DATATYPE this: Type.DATE, nested: False, prefix: False)), alias: 
          (IDENTIFIER this: end_date, quoted: False)), from: 
        (FROM this: 
          (TABLE this: 
            (IDENTIFIER this: my_table, quoted: True), db: 
            (IDENTIFIER this: my_schema, quoted: True), catalog: 
            (IDENTIFIER this: my_project, quoted: True)))), alias: 
      (TABLEALIAS this: 
        (IDENTIFIER this: clean, quoted: False)))))

[tobymao]

teradata already has this but i think it's wrong, it should be exp.StringToTime. we need to have time_format inside of the parser