[SQL] Support PARSE_DATE, PARSE_DATETIME, PARSE_TIME

[mihaibudiu]

These things can be much trickier than they look because Calcite already has rules for format strings, and they may not match the format strings that Rust libraries use. We already have a similar issue for the reverse direction: #2275

[mihaibudiu]

You will also note that the Calcite documentation does not specify anywhere the format string rules, they have to be reverse engineered from the implementation. These functions are actually in the BigQuery dialect, so the right documentation to use the BigQuery documentation.

[ryzhyk]

Can we just use the strftime format?

[mihaibudiu]

Only if strftime works in the same way across Java, Rust, and Bigquery.

[mihaibudiu]

But that's exactly why we have #2275, the interpretation of the format string is different in different languages.

[mihaibudiu]

Another alternative is for us not to load the bigquery function library at all, and then we can use these names.

[mihaibudiu]

Then we get to define how these functions work.